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WO2018122880A1 - Courroie transporteuse pour le transport d'un brin de fibre et son procédé de production - Google Patents

Courroie transporteuse pour le transport d'un brin de fibre et son procédé de production Download PDF

Info

Publication number
WO2018122880A1
WO2018122880A1 PCT/IN2018/000001 IN2018000001W WO2018122880A1 WO 2018122880 A1 WO2018122880 A1 WO 2018122880A1 IN 2018000001 W IN2018000001 W IN 2018000001W WO 2018122880 A1 WO2018122880 A1 WO 2018122880A1
Authority
WO
WIPO (PCT)
Prior art keywords
transport belt
belt
fibre strand
thermochromic
transporting fibre
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/IN2018/000001
Other languages
English (en)
Inventor
Amirthalingam JOTHIMURUGAN
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2018122880A1 publication Critical patent/WO2018122880A1/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
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/72—Fibre-condensing guides
    • 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
    • D01H5/70—Constructional features of drafting elements
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements

Definitions

  • the present invention generally relates spinning machines.
  • the present invention relates to compact spinning arrangement in the drafting and condensing zone of spinning machines.
  • the present invention relates to a transport belt for transporting a fiber strand to be condensed over a suction slit of a condensing zone in a drafting arrangement.
  • the modern Ring spinning machines comprises compact spinning arrangement in the drafting system.
  • the compact spinning system controls the fibre strand during drafting and supports to produce yarn with minimum number of protruding fibres.
  • Various types of compacting systems are available in the existing technology.
  • Suction compacting is one of the most commonly used Compacting system in the Ring spinning machines.
  • Said suction compacting arrangement consists a suction device with slit and a transport belt over the slit area and a pair of Top rollers for drafting the fibre strand.
  • a woven fabric comprising polyamide multifilament yarns having a diameter of less than 0.1 mm is used in Transport belts.
  • Said transport belt comprises centrical holes arranged in travel direction, through which holes the suction air stream enters.
  • the size of the perforations determines to what degree the fiber strand is bundled transversely to the transport direction in the condensing zone.
  • the transport belt is guided during operation over a suction slit, which extends in transport direction and which is essentially wider than the perforation.
  • the condensing of an already drafted, yet still spinning twist-free fiber strand serves the purpose of rolling outwardly projecting edge fibers around the core strand, so that a better material utilization is permitted and that the fiber strand is less hairy before being imparted a spinning twist. This results in a smoother and more tear resistant yarn.
  • the transport belt is disposed over the suction slit present in the suction device. Said transport belt rotates over the sliding surface and the suction slit at practically no distance thereto, all the air which is sucked in becomes practically "effective air", which results in a particularly good degree of effectiveness in condensing.
  • the drafted fibre strands are condensed through suction and twisted to form as a yarn and wound on the bobbins.
  • patent application number 6,073,314 describes a device for condensing the fibre strand and a transport belt made from polyamide fibres as an endless woven loop with plural perforations.
  • the present invention describes a transport belt with thermodynamic coating and a process for coating the surface with thermodynamic polymers which shall be used for compact spinning in Ring spinning machines.
  • the transport belt for transporting fibre strand is movably mounted on the suction device of the condensing zone arranged downstream of the drafting arrangement, wherein said transport belt consists Thermochromic materials.
  • Said transport belt is preferably a narrow-meshed woven band coated with Thermo-chromic materials.
  • said transport belt shall be an endless and perforated and can take the form of a latticed belt or sieve foil or advantageously as a narrow- meshed woven band.
  • Said transport belt surround the hollow profile and cover the suction slit in the hollow profile.
  • the transport belt is made up of filament yarns made up with thermochromic materials.
  • thermochromic material is Leuco dye in the form of powder or Liquid crystals.
  • said Thermochromic material is an inorganic material for example, titanium dioxide or Zinc oxide.
  • thermochromic coating is applied at the centre portion, edge portion, or on the entire width of the transport belt.
  • Said Thermochromic material is applied as surface coating through any preferable surface coating techniques.
  • Figure 1 depicts a compact drafting system known in the existing art.
  • Figure 2 depicts the problem in front compacting rollers arrangement in the existing art.
  • Figure 3 depicts the front compacting rollers arrangement according to the present invention.
  • FIG. 4a to 4c depict the various embodiments of transport belt according to the present invention
  • Figure 1 describes the Compact drafting arrangement (1) known in the art, which comprises three driven bottom rollers (2, 3 and * 4), which are arranged in a known, way on continuous drive shafts arranged in the machine longitudinal direction.
  • Upper rollers (5, 6 and 7) in the form of pressure rollers, are arranged at the bottom rollers (2, 3 and 4).
  • the bottom roller (4) and the top roller (7) form together the front roller pair (8) of the drafting arrangement (1), on which the roving or sliver (9) delivered in direction (A) undergoes a complete drafting process.
  • a drafted fiber strand is present, which undergoes a subsequent treatment downstream of the drafting arrangement (1), before it is delivered in delivery direction (B) to a twisting device, for example a ring spindle, and twisted to a yarn (11).
  • a twisting device for example a ring spindle
  • the middle bottom roller (3), as well as the middle top roller (6) are provided with a lower belt (12) and an upper belt (13). In addition reference is made to a guiding table (14) for the lower belt (12).
  • a condensing zone (15) is arranged downstream of the drafting arrangement (1), which serves the purpose of condensing the drafted fiber strand (10).
  • a suction device (16) is arranged at the condensing zone (15), which suction device (16) comprises a closed hollow profile (17).
  • The.hollow profile (17) is comprised of plastic or stainless steel or of any other low-friction coated material. It serves as a sliding surface for transport belt (18).
  • the transport belt (18) is an endless and perforated and can take the form of a latticed belt or sieve foil or advantageously as a narrow-meshed woven band. They surround the hollow profile (17) and cover the suction slit (19) in the hollow profile (17).
  • the transport belt (18) transport the drafted fiber strand (10) to a nipping point (20), which is formed in that a nipping roller (20) presses the respective transport belt (18) against the hollow profile (17).
  • the suction slit (19) is sufficiently long to reach the nipping point (20). .
  • the suction device (16) is provided with a suction air connection pipe (21), which is located approximately in the center between the two spinning stations and connected to the main suction unit.
  • a nipping roller (22) mounted over the suction device (16) drives the respective transport belt (18) and presses it against the hollow profile (17) of the suction device (16).
  • the nipping roller (22) is driven by the top roller (7) of the front roller pair (8) by a transfer gear arrangement (23).
  • Figure 2 depicts the problem in compact drafting arrangement (1) in the existing art.
  • the drafted fibre strand transport through the suction slit (19) undergoes a subsequent treatment downstream of the drafting arrangement through the suction air from the suction device (16) and suction air connection pipe (21). Due to suction, the liberated fibres are collected under the transport belt (18) and stored at the edge portion of the suction slit (19). Over a period of time, the collected short fibres are accumulated and forms as a tuft (24). When the size of tuft (24) increases, .it obstructs the flow of drafted fibre strand and also affects the suction of compacting device which results in frequent yarn breakages.
  • Figure 3 depicts the front compact drafting arrangement (1) according to the present invention.
  • the present invention is a transport belt (31 ), advantageously as a narrow-meshed woven band coated with Thermochromic materials.
  • the Thermochromic material is coated on the surface of Mesh apron.
  • Said Thermochromic materials are responsive to heat and changes its colour when temperature increases.
  • Figure 3 particularly describes the colour changed portion (32) of the transport belt.
  • the contact between the tuft (24) and transport belt creates a friction and results in heat generation.
  • the Thermochromic coating layer changes its colour. The operator can easily view the colour changed apron and thereby he can identify the dust accumulation immediately.
  • Figure 4a to 4c depict the various embodiments of transport belt according to the present invention.
  • the Thermochromic coating shall be given at the centre portion (32a) of the transport belt.
  • the Thermochromic coating shall be given at . the edge portion (32b) of the transport belt.
  • the Thermochromic coating shall be given to the entire width (32c) of the transport belt in horizontal direction with a frequent interval.
  • thermochromic coating shall also be applied to the driving means such as flat belt, timing belt, V-belt etc,.
  • the drive motors possibly produces heat. In case of any mechanical damages in the parts such as bearings, the heat generation will be higher.
  • the drive belt changes its colour, so that the heat generation problem shall be easily identified.
  • Heat reactive materials change state, shape and/or color when exposed to temperatures above ambient. Naturally, many materials change shape, eg. melt, at high temperatures. The shape and/or color can be altered at relatively low temperatures.
  • Thermochromic material is one of the heat reactive materials which are available in the form of pigments, Leuco dyes, powders and Liquid crystals.
  • thermochromic materials are based on liquid crystal technology. At specific temperatures the liquid crystals re-orientate to produce an apparent change of colour.
  • the liquid crystal material is micro-encapsulated and Billions of these capsules are mixed with a suitable base to make thermochromic printing ink or paint.
  • Liquid crystals shall be most preferably used in Transport belt, as their responses can be engineered to accurate temperatures. There are two types of said Liquid crystals used in dyes and inks often come microencapsulated, in the form of suspension
  • Thermochromic Color-Changing Paint Pigment changes color as the temperature changes. As the temperature goes up, the pigment becomes colorless, revealing the base coat or graphics underneath. Thermochromic Pigments change color when exposed to heat and turn back to their original color when the temperature drops again. These pigments can be mixed with an acrylic base or screen printing ink. The ratio of acrylic base to coloring pigment depends entirely on the application and density of color required.
  • Thermochromic dyes are based on mixtures of Leuco dyes with suitable other chemicals, displaying a color change (usually between the colorless Leuco form and the colored form) in dependence on temperature.
  • thermochromic material Polymers and . inorganic materials shall also be used as Thermochromic material.
  • An embedded thermochromic additive or a high ordered structure built by the interaction of a polymer with an incorporated non- thermochromic additive can be the origin of the thermochromic effect.
  • titanium dioxide and zinc oxide shall also be used to deliver the Thermochromic effect.

Landscapes

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

Abstract

La présente invention concerne une courroie transporteuse (31) pour transporter un brin de fibre à condenser sur une fente d'aspiration d'une zone de condensation dans une zone d'étirage (1) de machines à filer. Ladite courroie transporteuse (31) est de préférence une bande tissée étroitement maillée revêtue de matériaux thermochromiques (32).
PCT/IN2018/000001 2017-01-02 2018-01-01 Courroie transporteuse pour le transport d'un brin de fibre et son procédé de production Ceased WO2018122880A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN201741000103 2017-01-02
IN201741000103 2017-01-02

Publications (1)

Publication Number Publication Date
WO2018122880A1 true WO2018122880A1 (fr) 2018-07-05

Family

ID=62707037

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2018/000001 Ceased WO2018122880A1 (fr) 2017-01-02 2018-01-01 Courroie transporteuse pour le transport d'un brin de fibre et son procédé de production

Country Status (1)

Country Link
WO (1) WO2018122880A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109594167A (zh) * 2019-01-23 2019-04-09 江南大学 双丝包芯包缠纱生产装置及其生产方法
CN112359448A (zh) * 2020-09-27 2021-02-12 际华三五四二纺织有限公司 一种紧密纺上延长网格圈路径的装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997027360A1 (fr) * 1996-01-25 1997-07-31 Scapa Group Plc Equipement de separation de phases
DE202007013020U1 (de) * 2007-09-17 2007-11-22 Sefar Ag Siebriemchen für ein Streckwerk einer Spinnmaschine sowie Streckvorrichtung mit einem Siebriemchen
US7673740B2 (en) * 2005-10-29 2010-03-09 Phoenix Conveyor Belt Systems Gmbh Device for monitoring a conveyor
DE19837183C5 (de) * 1998-08-17 2010-12-30 Spindelfabrik Suessen Gmbh Endloses Transportband zum Transportieren eines verstreckten Faserverbandes
US7954632B2 (en) * 2005-11-16 2011-06-07 Phoenix Conveyor Belt Systems Gmbh Conveyor belt having replaceable segments

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997027360A1 (fr) * 1996-01-25 1997-07-31 Scapa Group Plc Equipement de separation de phases
DE19837183C5 (de) * 1998-08-17 2010-12-30 Spindelfabrik Suessen Gmbh Endloses Transportband zum Transportieren eines verstreckten Faserverbandes
US7673740B2 (en) * 2005-10-29 2010-03-09 Phoenix Conveyor Belt Systems Gmbh Device for monitoring a conveyor
US7954632B2 (en) * 2005-11-16 2011-06-07 Phoenix Conveyor Belt Systems Gmbh Conveyor belt having replaceable segments
DE202007013020U1 (de) * 2007-09-17 2007-11-22 Sefar Ag Siebriemchen für ein Streckwerk einer Spinnmaschine sowie Streckvorrichtung mit einem Siebriemchen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109594167A (zh) * 2019-01-23 2019-04-09 江南大学 双丝包芯包缠纱生产装置及其生产方法
CN112359448A (zh) * 2020-09-27 2021-02-12 际华三五四二纺织有限公司 一种紧密纺上延长网格圈路径的装置

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