EP0131409B1 - Train d'étirage - Google Patents

Train d'étirage Download PDF

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Publication number
EP0131409B1
EP0131409B1 EP19840304297 EP84304297A EP0131409B1 EP 0131409 B1 EP0131409 B1 EP 0131409B1 EP 19840304297 EP19840304297 EP 19840304297 EP 84304297 A EP84304297 A EP 84304297A EP 0131409 B1 EP0131409 B1 EP 0131409B1
Authority
EP
European Patent Office
Prior art keywords
roller
drafting
splitting
rollers
pair
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
Application number
EP19840304297
Other languages
German (de)
English (en)
Other versions
EP0131409A1 (fr
Inventor
Robert John Hunt
David Mccullough
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.)
James Mackie and Sons Ltd
Original Assignee
James Mackie and Sons 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
Priority claimed from GB08318222A external-priority patent/GB2142985B/en
Priority claimed from GB838318322A external-priority patent/GB8318322D0/en
Application filed by James Mackie and Sons Ltd filed Critical James Mackie and Sons Ltd
Publication of EP0131409A1 publication Critical patent/EP0131409A1/fr
Application granted granted Critical
Publication of EP0131409B1 publication Critical patent/EP0131409B1/fr
Expired 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
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/22—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01B—MECHANICAL TREATMENT OF NATURAL FIBROUS OR FILAMENTARY MATERIAL TO OBTAIN FIBRES OF FILAMENTS, e.g. FOR SPINNING
    • D01B1/00—Mechanical separation of fibres from plant material, e.g. seeds, leaves, stalks
    • D01B1/10—Separating vegetable fibres from stalks or leaves
    • D01B1/14—Breaking or scutching, e.g. of flax; Decorticating
    • D01B1/22—Breaking or scutching, e.g. of flax; Decorticating with crushing or breaking rollers or plates
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis

Definitions

  • This invention relates to the roller drafting of fibres.
  • any drawing operation is to reduce the weight of the material being fed into the machine whilst at the same time parallelising the fibres.
  • this is done by means of two sets of rollers with a bed of pinned fallers between them.
  • the material, fed through the first set of rollers, known as the feed rollers, is penetrated by the pins of the fallers which move in the same direction as the material.
  • the second set of rollers, i.e., delivery rollers, through which the material passes on leaving the fallers run at a greater speed than that of the first set thus drafting the material and reducing its weight.
  • the delivery rollers perform a dual function.
  • the fibres themselves are actually sub-divided or split so as to create finer fibers and to increase the number of fibres in the cross-section, which in turn, means that when the spinning stage is eventually reached a finer and stronger yarn can be produced.
  • this splitting operation it has been common practice to use a hard wooden pressing roller against a steel driving roller.
  • a drawing frame for drafting has at least one roller positioned downstream of the nip of the drafting rollers, the downstream roller is a splitting roller acting with a co-operating roller under sufficient pressure to split the fibres after they have been drafted by the drafting rollers.
  • Apparatus in accordance with the invention thus allows the material to be merely drafted without splitting or with only partial splitting at the nip of the drafting rollers, whilst splitting or further splitting of the fibres is carried out downstream of the nip of the drafting rollers.
  • One advantage of such an arrangement is that the heavy pressure originally required on the wooden roller in order to effect both drafting and splitting is either no longer necessary or it may be more evenly distributed and the "life" of the roller may be extended to an acceptable span.
  • the drafting rollers may now be of rubber since it is no longer required to split the fibre or of any other suitable material.
  • a production rate of 80 to 100 metres per minute may be possible using a drawing frame in accordance with this invention.
  • a sliver 2 of ftax which may be about 25,4 cm (10 inches) wide is fed between a set of three feed rollers 4 so as to enter the frame at for example, a weight of about 150 grams per metre.
  • the sliver then passes through a standard faller bed 6 and the sliver then passes between the nip of two drafting or delivery rollers 8, 8'.
  • the lower roller 8' is a steel driven roller and the surface of the upper pressing roller 8 is of rubber, having a shore hardness of 75 on the A scale.
  • rollers 8, 8' are rotated at about ten times the speed of the feed rollers 4 to produce a draft of ten.
  • the lower roller 8' is a steel driven roller and the upper pressing roller 8 is of rubber.
  • the sliver is then fed in a relaxed condition without further drafting to a further pair of "splitting" rollers 10, 10' located downstream of the delivery rollers 8.
  • the lower splitting roller 10' is driven and the upper roller 10 may be wooden or may be of a very hard rubber or plastic or Tufnol or indeed iron or steel. Alternatively it has been found that it may even be of the same rubber as the drafting roller.
  • the fibres are split as they pass between the splitting rollers and the sliver of weight of about 15 grams per metre is fed into a standard can 12.
  • the set of splitting rollers however comprises three rollers 10, namely, two lower driven rollers 10' and 10", and a single top or pressing roller 10, which is cradled between the two bottom rollers to create two nips so that the splitting action is enhanced and/or the life of the top roller 10 may be extended due to the reduction in pressure applied to it and/or by the better distribution of the pressure between the top roller and the bottom roller 2.
  • An additional roller 8" is positioned downstream of the bottom drafting roller 8' with a pressing roller 8 cradled between them.
  • the material is drafted between the nip of the bottom drafting roller 8' and the pressing roller 8 and then splitting is effected between the nip of the additional bottom roller 8" and the pressing roller 8.
  • Any suitable pressure arrangement as diagrammatically illustrated, in which load is applied through a pivoted arm 14, may be employed. By alternating the direction of pull on the pressing roller, as illustrated by the alternative position of the arm 14, shown in dash lines, concentration of load towards either of the bottom rollers, or equally between the two, may be effected.
  • the pressing roller may be of wood or any other suitable material including rubber.
  • a plurality (e.g. four) of narrower slivers may be fed in, side by side, and delivered into the same number of cans from standard coiler heads at the front.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (6)

1. Banc d'étirage pour l'étirage de fibres textiles, comprenant des moyens d'alimentation et une paire de rouleaux d'étirage positionnés en aval des moyens d'alimentation, caractérisé en ce qu'au moins un rouleau supplémentaire "de séparation" est positionné en aval de la ligne de contact des rouleaux d'étirage, le rouleau "de séparation" servant avec un rouleau coopérant sous une pression suffisante pour séparer les fibres après qu'elles aient été étirées par les rouleaux d'étirage.
2. Banc d'étirage suivant la revendication 1, dans lequel la surface du rouleau "de séparation" est en caoutchouc.
3. Banc d'étirage suivant l'une ou l'autre des revendications précédentes, dans lequel il est prévu une paire de rouleaux "de séparation" distincts de et situés en aval de la paire de rouleaux d'étirage.
4. Banc d'étirage suivant la revendication 3, dans lequel un troisième rouleau "de séparation" est positionné à côté du rouleau de séparation inférieur de ladite paire coopérant également avec le rouleau de séparation supérieur de ladite paire, le rouleau supérieur présentant une ligne de contact relativement en amont avec le premier rouleau de séparation inférieure et une ligne de contact relativement en aval avec le second rouleau de séparation inférieure.
5. Banc d'étirage suivant l'une ou l'autre des revendications 1 ou 2, dans lequel le rouleau de séparation est positionné immédiatement en aval du rouleau d'étirage inférieur de ladite paire de rouleaux d'étirage, pour coopérer avec le rouleau d'étirage ou de pression supérieur, le rouleau de pression présentant une ligne de contact relativement en amont avec le rouleau d'étirage inférieur et une ligne de contact relativement en aval avec le rouleau de séparation.
6. Banc d'étirage suivant la revendication 5, dans lequel la charge appliquée par le rouleau de pression supérieur sur le rouleau d'étirage inférieur et sur le rouleau de séparation peut être ajustée tant en grandeur qu'en direction.
EP19840304297 1983-07-05 1984-06-25 Train d'étirage Expired EP0131409B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB08318222A GB2142985B (en) 1983-07-05 1983-07-05 Impeller for a double inlet centrifugal fan
GB8318322 1983-07-06
GB838318322A GB8318322D0 (en) 1983-07-06 1983-07-06 Drawing frames

Publications (2)

Publication Number Publication Date
EP0131409A1 EP0131409A1 (fr) 1985-01-16
EP0131409B1 true EP0131409B1 (fr) 1987-12-23

Family

ID=26286546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19840304297 Expired EP0131409B1 (fr) 1983-07-05 1984-06-25 Train d'étirage

Country Status (1)

Country Link
EP (1) EP0131409B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11104601B2 (en) 2016-03-17 2021-08-31 Corning Incorporated Bendable electronic device modules, articles and bonding methods of making the same

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1342714A (en) * 1918-08-02 1920-06-08 Hall H Holdaway Machine for extracting fiber from palms and the like
GB318485A (fr) * 1928-09-03 1930-07-17 Saechsische Maschinenfabrik
FR660105A (fr) * 1928-09-08 1929-07-08 Appareil pour séparer des fibres de plantes textiles, et autres fibres adhérentes
FR687122A (fr) * 1929-12-23 1930-08-05 Perfectionnements dans les machines à étirer les matières textiles
US2107818A (en) * 1935-05-28 1938-02-08 Elzer Johann Textile drafting apparatus
FR823969A (fr) * 1936-07-06 1938-01-29 Fairbairn Lawson Combe Barbour Appareil décortiqueur pour obtenir des fibres à l'aide des feuilles d'agavées et plantes analogues
DE689642C (de) * 1938-12-10 1940-03-29 E H Emil Gminder Dr Ing Vorrichtung zum fortlaufenden Foerdern von Bastfaserstengeln durch ein Brechwerk
CH433071A (de) * 1965-01-21 1967-03-31 Osaka Kiko Kabushiki Kaisha Vorrichtung zum Trennen von Fasern
GB1091038A (en) * 1966-04-14 1967-11-15 Textilipari Ki Improvements in and relating to sliver drafting machines
FR2145411B1 (fr) * 1969-12-05 1974-03-29 Sant Andrea Novara Officine
DE2106815A1 (en) * 1970-02-20 1971-08-26 Imperial Chemical Industries Ltd London Drawing polyester staple fibre tows of - different length into untwisted yarns

Also Published As

Publication number Publication date
EP0131409A1 (fr) 1985-01-16

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