EP2242879A1 - Groupe d'excentriques pour rouleaux étireurs d'une machine textile, par exemple une peigneuse, un châssis étireur ou une machine à carder - Google Patents

Groupe d'excentriques pour rouleaux étireurs d'une machine textile, par exemple une peigneuse, un châssis étireur ou une machine à carder

Info

Publication number
EP2242879A1
EP2242879A1 EP09713313A EP09713313A EP2242879A1 EP 2242879 A1 EP2242879 A1 EP 2242879A1 EP 09713313 A EP09713313 A EP 09713313A EP 09713313 A EP09713313 A EP 09713313A EP 2242879 A1 EP2242879 A1 EP 2242879A1
Authority
EP
European Patent Office
Prior art keywords
drafting
roller
band
machine
drafting roller
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
EP09713313A
Other languages
German (de)
English (en)
Other versions
EP2242879B1 (fr
Inventor
Girolamo Prandini
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.)
Marzoli Machines Textile SRL
Original Assignee
Marzoli SpA
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 Marzoli SpA filed Critical Marzoli SpA
Publication of EP2242879A1 publication Critical patent/EP2242879A1/fr
Application granted granted Critical
Publication of EP2242879B1 publication Critical patent/EP2242879B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • D01G19/14—Drawing-off and delivery apparatus
    • D01G19/18—Roller, or roller and apron, devices, e.g. operating to draw-off fibres continuously
    • 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
    • D01H5/60—Arrangements maintaining drafting elements free of fibre accumulations
    • D01H5/62—Non-rotary cleaning pads or plates; Scrapers

Definitions

  • the present invention relates to a wiper device for a drafting roller of a textile machine, especially a combing machine.
  • a combing machine downward of the combing device, provides a device for transporting the web, composed of a set of coupled rollers.
  • Said transport device comprises a drafting group composed of coupled cylinders which the web passes through, moved so as to achieve a drafting of the web before being forwarded for subsequent processing.
  • rollers of the drafting group have the tendency to retain on the surface some residues, generally composed of fibre filaments which detach themselves from the web, and of dirt.
  • the transport device comprises a wiper group, positioned against the drafting roller, composed of a support rigidly attached to the combing machine, inside which is a rubber band, held in contact with the surface of the drafting roller.
  • the rubber band gathers the residues accumulated on the same and detaches them from the surface of the roller.
  • the known wiper groups show some malfunctions, due mainly to the tendency of the rubber band to stick inside its seat in the support, so that if, as often happens, it is unable to remove the residues from the surface of the roller, it creates structural interference with said roller which sometimes leads to the supports of the same breaking.
  • the purpose of the present invention is to provides for a wiper group for a drafting roller of a textile machine, especially a combing machine, which overcomes the drawbacks mentioned and satisfies the aforesaid requirements.
  • the characteristics and advantages of the wiper group according to the present invention will be evident from the description below, made by way of a non-limiting example according to the attached figures, wherein: [0013] - figure 1 shows a transport device of a combing machine, comprising a wiper group according to the present invention, in a functioning configuration; [0014] - figure Ia shows an enlargement of a portion of the transport device in figure 1; [0015] - figure 2 shows a perspective view of a portion of the transport device in figure 1;
  • FIG. 3 shows the transport device in figure 1, in a configuration of cleaning of the wiper group
  • FIG. 4 shows the transport device in figure 1, in a configuration of replacement of the wiper group
  • FIG. 5 shows a transport device of a combing machine, comprising a wiper group according to a further embodiment of the invention.
  • the description will refer to a wiper group of a drafting roller of a combing machine, but such wiper group may also be utilised for drafting rollers on other textile machines such as a drafting frame or carding machine.
  • reference numeral 1 denotes a transport device of the web W of a combing machine.
  • the combing machine comprises a combing device, for example with rotating combs, into which a web or fibre lap - is fed for combing and, downward of the combing device, said transport device 1 is positioned, to transport the web W downwardly from the combing machine.
  • the web is driven by coupled rollers, passing through the opening between them.
  • the transport device comprises at least one pressure roller, positioned over the web in transit.
  • the transport device following the direction of transit of the web, the transport device comprises a first pressure roller 2, a second pressure roller 4, a third pressure roller 6 and a fourth pressure roller 8, all positioned over the web in transit.
  • the pressure rollers 2, 4, 6, 8 are connected to respective actuators 2a, 4a, 6a, 8a for example pneumatic, able to press the respective rollers against the web in transit.
  • the transport device comprises sensors able to detect an external action contrary to the thrust direction of said actuators.
  • the combing machine also comprises a frame 10, hinged to the body so that when raised from the body access to the combing device or transport • device inside the combing machine is enabled.
  • the first, second and third pressure rollers 2, 4, 6 are joined to the frame 10 by means of the actuators 2a, 4a, ⁇ a, attached to it.
  • the transport device also comprises a first lower roller 12, parallel to and coupled with the first pressure roller 2, so as to be aligned vertically with it, that is in such a way that the direction of translation of the actuator piston 2a is the radial direction of said first lower roller 12.
  • the transport device also comprises a second lower roller 14 and a .third lower roller 16, parallel to the pressure rollers 2, A 1 6.
  • the second lower roller 14 and the third lower roller 16 are alongside the pressure roller 4 and respectively side by side upwardly and downwardly of their rotation axis, to form the openings for transit of the web so that the web in transit between the said openings remains essentially in contact with the surface of the second pressure roller 4.
  • the transport device 1 comprises in addition a main drafting roller 20, positioned underneath, alongside the third pressure roller 6 and the fourth pressure roller 8 to form the transit opening for driving the web.
  • the main drafting roller 20 and the pressure rollers 6, 8 are reciprocally positioned so that the web in transit undergoes a curving of its path downwards.
  • the lower rollers 12, 14, 16 and the main drafting roller 20 are motorised, that is they are connected to one or more motorizations which impose, directly or indirectly through kinematic chains, a desired speed of rotation to each.
  • Said rotation speeds are such as to produce a drafting of the web, for instance between the first lower roller 12 and the second lower roller 14 and between the third lower roller 16 and the main drafting roller 20.
  • the entity of the draft between the first lower roller 12 and the second lower roller 14 is much less than the entity of the draft between the third lower roller 16 and the main drafting roller 20, so much so that in the first case one usually speaks of pre- drafting and in the second of main drafting.
  • the transport device 1 comprises in addition, a funnel 22, positioned downwardly of the main drafting roller 20, towards which the drafted web is driven and through which the web transits, condensing, before being fed onwards for subsequent processing.
  • the combing machine also comprises aspiration devices positioned below the transport device, able to aspirate the residues.
  • Said aspiration devices comprise an aspiration nozzle 29, positioned under the lower rollers 12, 14, 16.
  • the transport device 1 also comprises at least one wiper group 30 coupled to a roller to gather and detach the surface residues from it.
  • the wiper group is coupled to the first or second or third lower roller 12, 14, 16, or a number of wiper groups are provided, each coupled to a roller.
  • the wiper group 30 is coupled to the main drafting roller 20.
  • the wiper group 30 comprises a support 32 fitted with a seat 34 and a soft band 36, lodged in said seat
  • the seat is in the form of a channel and the band sits on the bottom of it.
  • the band 36 is lodged * inside the seat 34 with play.
  • the thickness of the band 36 is less than the width of the seat, so that between the band and the seat there is play.
  • the band 36 is made in rubber and has a lip 38 protruding from the seat 34, in contact with the surface of the main drafting roller 20.
  • the lip 38 protrudes inclined in the direction of rotation of the main drafting roller 20, to drag over this without sticking or causing unwanted vibrations .
  • the support 32 is oscillating and said wiper group comprises influencing devices able to constantly influence the support 32 to press the band 36 towards the surface of the main drafting roller 20.
  • the wiper group 30 comprises a flange 40 for attachment to the body of the combing machine, while the support 32 is mounted in an oscillating manner to the flange 40 by means of the interposition of said influencing devices.
  • the support 32 is mounted to the flange 40 so as to rotate around a rotation axis X, incident to a plane orthogonal to the rotation axis of the main drafting roller 20.
  • the influencing devices comprise a torsion spring 42, by means of which the support 32 is hinged to the flange 40, so as to be constantly influenced to rotate in the direction bringing the band 36 against the surface of the main drafting roller 20.
  • the torsion spring is composed of a cylinder in elastic material, for example polyurethane.
  • the flange 40 has at least one slotted hole 44 to attach the flange to the body of the combing machine in an adjustable manner.
  • the wiper group 30 comprises a pair of supports 32 and a pair of flanges 40, respectively hinged to each other and positioned close to the axial extremities of the main drafting roller 20.
  • the band 36 is inserted in the seats 34 of each support 32, thereby lying on its extremities in the manner of a beam between two supports.
  • the two flange-support assemblies are structurally independent in the same way as the action of the influencing means on each support is independent so that, to spontaneously move the band against the surface of the main drafting roller 20, one support is rotated more or less than the other in relation to its flange.
  • this makes it possible to spontaneously accommodate the band in the seats of the supports and against the main drafting roller 20, absorbing dimensional tolerance of the band, assembly tolerance of the wiper group and any wear of the band itself.
  • the web is driven by the transport device 1 and undergoes drafting between the first pressure roller 2 and last pressure roller 8.
  • residues are accumulated and pile up composed mainly of filaments which have detached from the web and from dirt, interfering structurally with the rollers themselves.
  • the band 36 of the wiper group is held against the main drafting roller 20, so that it easily gathers the residues, while the roller proceeds to rotate, detaching them from the surface.
  • the oscillation of the support absorbs the ensuing shock, preventing sticking and breaking.
  • the support 32 is attached to the body of the combing machine and has the seat 34 inside which the band 36 is lodged, with play.
  • the thickness of the band 36 is less than the width of the seat 34, so that between the band and the seat there is play.
  • the band comprises the lip 38, .protruding from the seat 34 against the main drafting roller 20.
  • the wiper group 30 comprises a spring 40, lodged in the seat 34 of the support 32, between the band 36 and the bottom of the seat 34.
  • the spring 40 constantly influences the band 36 to hold it against the main drafting roller 20.
  • the wiper group according to the present invention makes it possible to detach the residues from the drafting roller and, in the presence of residues resistant to detachment, easily absorbs the ensuing action of interference, preventing breakage of the parts involved or the significant warping of the band, which would entail poor functioning of the wiper group.
  • the band naturally takes up position inside the seats of the supports, thereby helping to absorb the interference of the residues and facilitating assembly of the wiper group.
  • the wiper group is easy to clean: it is, in fact, sufficient to rotate the support to bring the band into such a position that the lip is accessible and can therefore be cleaned of any residues accumulated.
  • the wiper group is easy to repair; for example, after rotating the support the band can easily be removed without undergoing interference from other mechanical parts.

Landscapes

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

Abstract

L'invention concerne un groupe d'excentriques (30) pour un rouleau étireur (20) d'une machine textile, par exemple une peigneuse, un châssis étireur, une machine à carder et similaire, comportant un support oscillant (32) sur lequel une bande de caoutchouc (36) est montée. Le groupe d'excentriques est particulièrement efficace pour absorber l'interférence sur la bande, de résidus accumulés sur le rouleau étireur.
EP09713313.6A 2008-02-22 2009-02-18 Dispositif de transport d'une machine textile Active EP2242879B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000040A ITBS20080040A1 (it) 2008-02-22 2008-02-22 Gruppo raschiatore per cilindri di stiro di una macchina tessile, ad esempio una pettinatrice, uno stiratoio o una cardatrice
PCT/IB2009/050654 WO2009104139A1 (fr) 2008-02-22 2009-02-18 Groupe d'excentriques pour rouleaux étireurs d'une machine textile, par exemple une peigneuse, un châssis étireur ou une machine à carder

Publications (2)

Publication Number Publication Date
EP2242879A1 true EP2242879A1 (fr) 2010-10-27
EP2242879B1 EP2242879B1 (fr) 2019-10-23

Family

ID=40291486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09713313.6A Active EP2242879B1 (fr) 2008-02-22 2009-02-18 Dispositif de transport d'une machine textile

Country Status (5)

Country Link
EP (1) EP2242879B1 (fr)
CN (1) CN101952493B (fr)
BR (1) BRPI0906476B1 (fr)
IT (1) ITBS20080040A1 (fr)
WO (1) WO2009104139A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20110693A1 (it) * 2010-08-11 2011-10-27 Rieter Ingolstadt Gmbh Meccanismo di stiratura di una macchina tessile nonche' procedimento per il suo funzionamento
CN107630269A (zh) * 2017-11-01 2018-01-26 经纬纺织机械股份有限公司 一种精梳机牵伸喇叭口结构
IT201900005608A1 (it) * 2019-04-11 2020-10-11 Marzoli Machines Textile Srl Pettinatrice di una linea di preparazione alla filatura

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB261323A (en) * 1926-09-11 1926-11-18 Ellis Hartley Improvements in and relating to roller cleaners for spinning and like machines
GB744156A (en) * 1953-06-19 1956-02-01 John Stanley Norris Improvements in or relating to drawing heads for textile drawing and/or spinning frames
US3407428A (en) * 1965-07-12 1968-10-29 Pneumafil Corp Scraper roll clearer
DE2405018A1 (de) * 1974-02-02 1975-08-21 Erich A Dipl Ing Maehr Putzvorrichtung fuer die walzen von spinn-streckwerken o.dgl.
JPH01104837A (ja) * 1987-10-12 1989-04-21 Yoji Kitamura パットクリヤラー支持装置
DE3929490A1 (de) * 1989-09-05 1991-03-07 Zinser Textilmaschinen Gmbh Verfahren und vorrichtung zum taktweisen abheben eines an einer bewegbar gelagerten putzleiste angeordneten abstreifelements
TW208050B (fr) * 1991-07-05 1993-06-21 Kitamura Youzi
DE102005010769A1 (de) * 2005-03-09 2006-09-14 Rieter Ingolstadt Spinnereimaschinenbau Ag Vorrichtung an einer Spinnereivorbereitungsmaschine mit einem Streckwerk

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009104139A1 *

Also Published As

Publication number Publication date
CN101952493B (zh) 2013-06-19
WO2009104139A1 (fr) 2009-08-27
ITBS20080040A1 (it) 2009-08-23
BRPI0906476A2 (pt) 2015-07-14
EP2242879B1 (fr) 2019-10-23
CN101952493A (zh) 2011-01-19
BRPI0906476B1 (pt) 2019-05-14

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