EP2376685B1 - Lap-forming device for machines manufacturing fibre webs, such as a lap-winder - Google Patents

Lap-forming device for machines manufacturing fibre webs, such as a lap-winder Download PDF

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Publication number
EP2376685B1
EP2376685B1 EP09805862A EP09805862A EP2376685B1 EP 2376685 B1 EP2376685 B1 EP 2376685B1 EP 09805862 A EP09805862 A EP 09805862A EP 09805862 A EP09805862 A EP 09805862A EP 2376685 B1 EP2376685 B1 EP 2376685B1
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EP
European Patent Office
Prior art keywords
lap
belt
calender
formation
previous
Prior art date
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Active
Application number
EP09805862A
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German (de)
English (en)
French (fr)
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EP2376685A1 (en
Inventor
Girolamo Prandini
Roberto Torcoli
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 SpA
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Marzoli SpA
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Publication of EP2376685A1 publication Critical patent/EP2376685A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G27/00—Lap- or sliver-winding devices, e.g. for products of cotton scutchers, jute cards, or worsted gill boxes
    • D01G27/02—Lap- or sliver-winding devices, e.g. for products of cotton scutchers, jute cards, or worsted gill boxes with lap-roll or the like loaded to provide firm packages

Definitions

  • the present invention relates to a lap-forming device for machines manufacturing fibre webs, such as a lap winder.
  • a fibre manufacturing system foresees processing of the fibre, usually in the form of flock, to obtain a yarn.
  • the system is composed of a number of machines; the carding machines in particular make it possible to produce a fibre web.
  • a number of webs are drawn and joined to each other to form a lap, wound onto a tube to form a lap in a lap-forming device.
  • EP-A1-1464739 One embodiment of a forming device is described in EP-A1-1464739 , in the Applicant's name. Further examples are described in EP 160165 and US 3134553 .
  • the laps are then sent to the combing machines and the web produced by these starting from the laps is sent to the drawing frames, roving frames, and spinning frames, for the formation of webs, reels of roving and yarn respectively.
  • the laps are formed in the devices of the known art, remaining in pressurised contact with two calenders rotating at high speed.
  • the lap formed by winding a soft web, especially near the contact up line of a calender, tends to form a thickening due to the resistance met by the lap as it is wound over the surface of the calender. This phenomenon is known of in the trade as "thickening"
  • the purpose of the present invention is to produce a lap-forming device, in particular for a lap-winder, able to overcome or contain the problem of thickening formation.
  • FIG. 1 shows a perspective view of a lap-forming device according to one embodiment of the present invention, in an initial functioning configuration
  • figure 2 shows a perspective view of the device in figure 1 , in an intermediate configuration
  • figure 3 shows a perspective view of the device in figure 1 , in a final configuration
  • FIG. 4 shows a schematised view of the forming device according to the present invention, according to a further embodiment
  • - figures 5a to 5h shows a further embodiment of the forming device, in a series of manufacturing phases
  • a machine for manufacturing fibre webs or a lap such as a lap-winder, comprises a lap-forming device 1.
  • the device 1 has an input area 2 for the entrance of a web W, coming from equipment up line of the device 1, such as for example drawing and winding equipment of the lap-winder.
  • the device 1 comprises an input unit 4 receiving the incoming web W and deviating the direction of advancement, positioned in the input area 2.
  • the input unit 4 comprises a motorised input cylinder 6, and a pair of input rollers 8, 10, engaged with the input cylinder to drag the web W.
  • the input unit 4 comprises an alignment roller 12, which the web W passes over before continuing towards a formation area 20 of a lap L.
  • the lap L is formed by the web W wound around a tube T perforated on the surface.
  • the device 1 comprises, in addition, a pair of calenders, for example motorised, preferably with a fixed rotation axis, for the formation of the lap L.
  • a pair of calenders for example motorised, preferably with a fixed rotation axis, for the formation of the lap L.
  • the device 1 comprises at least one belt 30 engaged with at least one of said calenders, called the primary calender 22, facing the other calender, called the secondary calender 24, to accompany the formation of the lap L.
  • the belt 30 is in contact with the primary calender 22 at least in one contact portion, having a circular sector arrangement, situated opposite the area of formation 20, that is opposite the secondary calender 24.
  • the device 1 comprises means of adjusting the tension able to regulate the tension of the belt 30 during formation of the lap.
  • the means of adjustment comprise a tensioning roller 40, engaged with the belt 30, having a mobile rotation axis to tighten or loosen the belt and thus regulate the tension.
  • the belt 30 forms a closed circuit which surrounds the primary calender 22.
  • the alignment roller 12 and the tensioning roller 40 are positioned within the circuit formed by the belt.
  • the belt 30 passes between the primary calender 22 and the input cylinder 6 and engages at least one of the input rollers 8, 10 before being deviated by the end roller 12 and going towards the formation area of the lap.
  • the belt 30 acts as a means of transport of the web for at least part of the circuit.
  • the web W and the belt 30 converge towards the second input roller 10, so that, up line of the second input roller 10, the web W and the belt 30 are separate and converge towards the roller 10, while down line of the input roller 10, the web is supported by the belt 30 and directed towards the alignment roller 12.
  • the device 1 comprises, in addition, a guidance device to guide the lap being formed or the tube.
  • said guidance device comprises a carriage 50 comprising a pair of plates 52, distanced along the rotation axis of the calenders 22, 24, so as to delimit an area between them.
  • the tube T When lap forming is started the tube T, still without a web around it, rests on the two calenders 22, 24 and is positioned between the plates 52 of the guidance device.
  • the carriage 50 comprises, in addition, first movement devices, connected to the plates 52, to move these along a formation direction, for example coinciding with the direction tangent to the two calenders 22, 24.
  • said movement devices are pneumatic.
  • the carriage 50 is in a retracted limit position, so that the two plates 52 find themselves at the axial ends of the tube T, containing it.
  • the tensioning roller 40 is in a limit tensioning position, in which the belt is at its maximum tension; in other words the tensioning roller 40 is at the maximum distance from the rotation axis of the primary calender 22, so as to tighten the belt 30.
  • the calenders 22, 24 are placed in rotation and the web W is fed to the input unit 4 and transported by the belt 30 towards the tube T.
  • the lap is pressed by the carriage 50 onto the two calenders 22, 24 in rotation and fed with web W by the belt 30.
  • the carriage 50 is in an intermediate position, in which the plates 52 are translated in the formation direction, distanced by the rotation axes of the calenders 22, 24 by a greater distance than in the initial formation configuration.
  • the tensioning roller 40 is in an intermediate tensioning position suitable to tension the belt 30 less than in the initial formation configuration. In other words, the tensioning roller 40 is closer to the rotation axis of the primary calender 22 than in the initial formation configuration of the lap.
  • the belt loosens and adapts to the shape of the lap, for example curving up line of the belt-calender contact portion 22.
  • the belt 30 acts as at guide element of the lap in formation and in particular permits elimination of the thickening problem.
  • the lap has the desired maximum volume
  • the carriage 50 is in the forward limit position, that is the plates are at the maximum distance from the rotation axes of the calenders
  • the tensioning roller is in the minimum tension position, that is at the minim distance from the rotation axis of the primary calender 22.
  • the input unit 4 comprises the input cylinder 6, toward which the belt 30 and the web W converge, down line of which the belt 30 transports the web W, and it is fitted with an alignment roller 12 astride which the belt 30 transporting the web W positions itself, subsequently moving towards the formation area 20.
  • the input unit comprises a pair of further input rollers 14, 16 which encircle the alignment roller 12.
  • the belt 30, down line of the input cylinder 6, passes between the end roller 12 and the first input roller 14 and then between the end roller 12 and the second input roller 16, to then detach itself from the end roller 12 and proceed towards the formation area 20.
  • the forming device 1 comprises mobile accompanying devices able to modify their position on command in relation to the alignment roller 12 to engage it in different areas and facilitate, among other things, initialisation of the lap L.
  • the accompanying devices comprise at least one accompanying roller having a rotation axis essentially parallel to that of the alignment roller 12 with which it is engaged, together with the belt 30, in the accompaniment of the web, and arrangable upon command relative to this.
  • the accompanying devices comprise a pair of accompanying rollers 60, 62 and a command flange 64, for example composed of a disc coaxial to the alignment roller, to which the accompanying rollers are joined in rotation.
  • the accompanying devices comprise second movement devices bringing the accompanying rollers of the alignment roller closer together or further away upon command.
  • the movement devices comprise a first support 66 and a second support 68, each of which supports one of said accompanying rollers 60, 62.
  • the two supports are counter-shaped to the alignment roller.
  • the two supports are hinged to each other and, for example, in the same point, hinged to the command flange 64.
  • the movement devices comprise, in addition, a cylinder-piston unit 70, for example pneumatically driven, joined to the command flange and connected to the supports 66, 68. Activation of the cylinder-piston unit leads to rotation of the supports and therefore to the accompanying rollers being brought closer to or further away from (depending on the direction of translation of the piston) the alignment roller.
  • a cylinder-piston unit 70 for example pneumatically driven
  • a first phase ( figure 5a ) of introduction of the web W (initialisation phase) into the forming device 1 fitted with accompanying devices, the command flange is made to rotate so that the accompanying rollers, and in particular the up line accompanying roller 60, are brought as far as possible up line of the alignment roller in relation to the direction of advancement of the belt.
  • the incoming web W, transported by the belt 30, immediately engages with the accompanying roller 60 and the alignment roller 12.
  • the carriage 50 progressively :traslates and the belt 30 is progressively sprung.
  • the web W needs to be torn, so as to be able to remove the formed lap L and start forming a new lap.
  • the command flange 64 is made to rotate so that the accompanying rollers, and in particular the down line accompanying roller 62, move as far downwards as possible in relation to the alignment roller 12.
  • the movement devices are driven in such a direction as to cause pressure of the accompanying rollers against the alignment roller 12.
  • the piston of the cylinder-piston unit 70 is retracted, causing pressure of the accompanying rollers on the alignment roller.
  • the belt 30 is tightened by the tensioning roller 40; the belt itself acts on the lap 30, making it roll onto the secondary calender 24.
  • the dimensions of the calenders and their reciprocal positioning are set so that the centre of gravity of the lap L formed, falls on the descending section of the surface of the secondary calender 24, causing the lap to fall freely once disengaged from the action of the plate 52.
  • the gap 100 between the calenders is an asymmetric area in a common direction tangent to said calenders.
  • the "gap between the calenders” is defined as the area delimited by the two lateral cylindrical surfaces 22a, 24a of the two calenders 22, 24 and by an imaginary tangent plane 102 common to the two surfaces 22a, 24a of the calenders in the formation area 20, where the tube T is positioned in contact with the two calenders.
  • the gap 100 is asymmetric in that the diameter of the primary calender 22, inside the circuit of the belt 30, is smaller than the diameter of the secondary calender 24.
  • the size ratio between the diameter of the primary calender and the diameter of the secondary calender is between 0.2 and 0.5, preferably between 0.3 and 0.4, and generally speaking 0.27.
  • the lap-forming device 1 fitted with the plates 52 and the tube T form a system in which the belt 30 is not pinched between the tube T and the primary calender 22 ( figure 6a ); this can be seen by the fact that, along a primary calender plane I, passing through the rotation axis of the primary calender and the axis of the tube T in the initial condition and blocked between the plates 52, the surface of the tube is not in contact with the work surface of the belt, but has an interspace S, of about 0.5 - 1 millimetre.
  • the belt 30 of the forming device 1 has a winding curve 110 on the primary calender 22, from the tangency point 112 of the tube T in the direction opposite to that of advancement of the belt in normal functioning.
  • the tube T rests on the two calenders 22, 24; in particular, it is in contact with the belt 30 along the segment 112; the belt 30, up line of the segment 112, is wound around the primary calender 22 in a winding curve 110, before separating from it.
  • the winding curve is obtained by virtue of the alignment roller 12 being positioned significantly distant from the formation area and rotated in relation to the vertical.
  • the embodiment with winding curve 110 also foresees a gap 100 between the asymmetric calenders.
  • the lap-forming device 1 comprises an auxiliary support roller 150, positioned between the alignment roller 12 and the primary calender 22; a support section 152 of the belt is thus defined between the contact segments of the belt 30 with the primary calender 24 and the support roller 150 ( figure 8 ).
  • the embodiment with the support roller foresees an asymmetric gap 100 between the calenders and/or a winding curve of the belt on the primary calender.
  • the lap-forming device 1 fitted with the plates 52 and the tube T forms a system in which the belt 30 is not in contact with the tube T, at the beginning of the formation cycle and with the tube blocked between the plates ( figure 8a ).
  • the surface of the tube ha an interspace S, of about 0.2 - 2 millimetres.
  • the belt 30 is perforated, that is it has a number of holes going through its thickness.
  • the belt 30 has a width or dimension in the direction of the rotation axes of the calenders, greater than the axial length of the primary calender and for example, slightly smaller, by about 0.5 millimetres per side, than the axial distance between the plates 52.
  • the belt 30 has a width, or dimension in the direction of the rotation axes of the calenders, much smaller than the axial distance between the plates.
  • the belt 30 is narrower than the distance between the plates 52 by about 5 millimetres per side.
  • the device 1 comprises two lateral flanges 200, positioned at the sides of the primary calender 22 and firmly attached to it; the flanges 200 project radially in relation to the surface of the primary calender 24, preferably at least by the thickness of the belt, so as to form a winding guide for the belt 30 which winds onto the primary calender 22 so as to form a cylindrical surface in contact with the lap being formed.
  • the device 1 comprises means of centring the tube, for example comprising a pair of inserts 202 of a truncated cone shape, attached centrally to the plates 52, suitable to insert in the tube T, so as to centre its position, at least at the beginning of the lap-forming cycle.
  • the forming device according to the present invention makes it possible to eliminate or reduce thickening during formation of the lap.
  • the device makes it possible to use high speeds of rotation to form the lap while maintaining high quality standards.
  • the asymmetric gap between the calenders makes it possible to distribute the pressure exerted by the calenders on the lap being formed in an optimal manner, thereby limiting formation of thickening.
  • the winding angle of the belt on the primary calender makes it possible to leave the lap being formed undisturbed by the turbulence generated by the moving belt.
  • the perforated belt makes it possible to limit the effect of the turbulence caused by the moving belt on the lap in formation, in that the currents flow outside the formation area thanks to the passages created by the holes.
  • the reduced width belt makes it possible to limit the possibility of interference with the plate and the pinching of the strips of web, while the flanges of the main calender stably guide the winding belt in any case.
  • the insert of the plates makes it possible to position the tube adequately at the beginning of the formation cycle aligned with the plates, to prevent it from then rotating eccentrically with these.
  • the primary calender is perforated on the surface to distance the turbulent currents generated by the movement of the belt.
  • the primary calender is motorised; according to a further variation, the primary calender is not motorised.
  • the secondary calender is motorised and independent of the movement of the primary calender, to minimise the thickening.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
EP09805862A 2008-12-19 2009-12-17 Lap-forming device for machines manufacturing fibre webs, such as a lap-winder Active EP2376685B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS2008A000232A IT1392450B1 (it) 2008-12-19 2008-12-19 Dispositivo di formazione della teletta per macchine per la lavorazione di nastri di fibra, ad esempio per uno stiroriunitore
PCT/IB2009/055822 WO2010070608A1 (en) 2008-12-19 2009-12-17 Lap-forming device for machines manufacturing fibre webs, such as a lap-winder

Publications (2)

Publication Number Publication Date
EP2376685A1 EP2376685A1 (en) 2011-10-19
EP2376685B1 true EP2376685B1 (en) 2012-12-19

Family

ID=41165180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09805862A Active EP2376685B1 (en) 2008-12-19 2009-12-17 Lap-forming device for machines manufacturing fibre webs, such as a lap-winder

Country Status (5)

Country Link
EP (1) EP2376685B1 (zh)
CN (1) CN102282300B (zh)
BR (1) BRPI0923105B1 (zh)
IT (1) IT1392450B1 (zh)
WO (1) WO2010070608A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016049910A1 (zh) * 2014-09-30 2016-04-07 惠州市吉瑞科技有限公司 一种自动卷棉装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1397053B1 (it) * 2009-12-24 2012-12-28 Marzoli Combing & Flyer S P A Ora Marzoli S P A Sistema di formazione della teletta per macchine per la lavorazione di nastri di fibra, ad esempio per uno stiroriunitore.
ITBS20110097A1 (it) 2011-06-29 2012-12-30 Marzoli Combing & Flyer S P A Dispositivo di deviazione di nastri ad uno stiroriunitore di una linea di filatura
CN104947251A (zh) * 2015-06-27 2015-09-30 际华三五四二纺织有限公司 棉卷防粘连装置
DE102018103543A1 (de) 2018-02-16 2019-08-22 Trützschler GmbH & Co Kommanditgesellschaft Verfahren zum Betreiben eines Bandwicklers und damit betriebener Bandwickler

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3134553A (en) * 1961-01-17 1964-05-26 Cameron Machine Co Tucking means for a web-winding machine
IN163508B (zh) * 1984-03-15 1988-10-01 Rieter Ag Maschf
CN1161677A (zh) * 1994-09-21 1997-10-08 欧文斯科尔宁格公司 包装可压缩的绝缘材料的方法和装置
IT1283695B1 (it) * 1995-09-04 1998-04-23 Rieter Ag Maschf Macchina per avvolgere nastri a rotoli di tela
EP1464739B1 (en) * 2003-04-04 2008-09-03 Marzoli S.p.A. Lap-forming machine and process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016049910A1 (zh) * 2014-09-30 2016-04-07 惠州市吉瑞科技有限公司 一种自动卷棉装置

Also Published As

Publication number Publication date
BRPI0923105B1 (pt) 2019-07-16
CN102282300A (zh) 2011-12-14
ITBS20080232A1 (it) 2010-06-20
IT1392450B1 (it) 2012-03-09
EP2376685A1 (en) 2011-10-19
WO2010070608A1 (en) 2010-06-24
CN102282300B (zh) 2014-05-07

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