EP3545122B1 - Vorrichtung zum strecken einer bahn zwischen einer kardiervorrichtung und einem kreuzleger - Google Patents

Vorrichtung zum strecken einer bahn zwischen einer kardiervorrichtung und einem kreuzleger Download PDF

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Publication number
EP3545122B1
EP3545122B1 EP17804493.9A EP17804493A EP3545122B1 EP 3545122 B1 EP3545122 B1 EP 3545122B1 EP 17804493 A EP17804493 A EP 17804493A EP 3545122 B1 EP3545122 B1 EP 3545122B1
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EP
European Patent Office
Prior art keywords
web
belt
roller
lapper
drafting
Prior art date
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Application number
EP17804493.9A
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English (en)
French (fr)
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EP3545122C0 (de
EP3545122A2 (de
Inventor
Jean-Christophe Laune
Hugues Leroy
Frédéric NOELLE
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Andritz Asselin Thibeau SAS
Original Assignee
Andritz Asselin Thibeau SAS
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Publication date
Application filed by Andritz Asselin Thibeau SAS filed Critical Andritz Asselin Thibeau SAS
Priority to EP24161459.3A priority Critical patent/EP4357497A2/de
Publication of EP3545122A2 publication Critical patent/EP3545122A2/de
Application granted granted Critical
Publication of EP3545122B1 publication Critical patent/EP3545122B1/de
Publication of EP3545122C0 publication Critical patent/EP3545122C0/de
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Anticipated expiration legal-status Critical

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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
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/46—Doffing or like arrangements for removing fibres from carding elements; Web-dividing apparatus; Condensers
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G21/00—Combinations of machines, apparatus, or processes, e.g. for continuous processing
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G23/00—Feeding fibres to machines; Conveying fibres between machines
    • D01G23/08—Air draught or like pneumatic arrangements
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G25/00—Lap-forming devices not integral with machines specified above
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)

Definitions

  • the present invention relates to an installation for forming a sheet of fibers comprising at least one device for forming at least one web, in particular a card, a spreader-lapper, and a device for stretching the at least one web being arranged between the device for forming at least one web, in particular the card, and the spreader-lapper, the stretching being carried out to control the surface mass distribution profile (g/m 2 ) or thickness of the web coming out of the spreader-lapper.
  • This stretching device of the prior art has several drawbacks.
  • pinching the web coming from the card at two points before entering the spreader-lapper has the effect of marking the web entering the spreader-lapper, creating thus inhomogeneities in the web detrimental to the quality of the web at the outlet of the spreader-lapper.
  • pinching the veil has the effect of expelling, at the level of the pinches, the air found in the veil coming from the card.
  • this air which escapes from the web due to pinching, negatively influences the transport of the card web, for example by causing it to detach from its transport belt and/or by creating folds locally.
  • the result is either a poor quality web, or the need to provide complicated systems to evacuate the air and/or eliminate the effects of air on the transport of the card web.
  • WO-A-94/05836 a device for forming a non-woven web, in which a web passes from a carder to a spreader-lapper via a regulation device by compensating for the play formed by the web during its transfer .
  • a suction device for transferring a nonwoven between an upstream unit and a downstream unit.
  • the present invention aims to overcome the drawbacks of the prior art by proposing an installation for forming a sheet of fibers, in particular of non-woven fabric, comprising a device for forming web(s) of fibers, for example example a carder, a spreader-lapper and a device for stretching the fiber web(s) arranged between the web-forming device(s) and the spreader-lapper, which makes it possible to carry out stretching, in particular variable depending on the time, in particular periodic, of the web or webs of fibers to thus adjust a desired profile given in advance of the sheet at the outlet of the spreader-lapper, in particular a very homogeneous sheet, in particular having a transverse profile of thickness and /or of uniform or quasi-uniform surface mass, without having to pinch the web(s), so as to simply obtain a sheet at the outlet of the spreader-lapper of better quality, in particular not including any point or zone deteriorated, as may be the case in the prior art due to pinching, and in particular without it being
  • an installation for forming a sheet of fibers, in particular non-woven is as defined in claim 1, improvements being defined in the subclaims.
  • the advantage of holding by adhesion linked to the stretching-clamping combination, compared to pinching, is that the long fibers arranged generally in the direction of travel of the web, retain a certain freedom of relative movement allowing a more progressive application of stretching and therefore limit the marking of the product.
  • the stretching device comprises a roller, part of the exterior surface of which carries out the transport of the web(s) between the exit belt(s) and the entrance belt, the roller being controlled by means rotation drive so as to control its rotation speed to vary it according to the stretching that we wish to impart to the sail(s).
  • two sail exit belts in particular carding belts, are provided, upper and lower respectively, the two upper and lower sails joining the stretching roller.
  • the or each exit belt is inclined relative to the entrance belt of the spreader-lapper.
  • the exit end point of the or each belt is offset in height relative to, in particular is above the, entry end point of the entrance belt of the spreader-lapper.
  • the upper web comes into contact with the exterior surface of the stretching roller and is moves along this exterior surface to the return roller of the spreader-lapper entrance belt.
  • the web forming device is arranged to move the exit belts at a constant or substantially constant speed while the peripheral speed of the stretching roller is controlled so that the latter drives the card web at a speed greater than that of the veil at the exit of the card and variable according to the stretch that we wish to impart to the veil(s).
  • the speed of the spreader-lapper entrance belt rotates at the same speed as the periphery of the stretching roller.
  • the entrance belt of the spreader-lapper drives the web at a speed slightly higher than that of the stretching roller, for example higher by 1% to 10%, this stretching (difference in speeds) between the stretching roller and the lapper inlet being preferably constant, and therefore independent of the variable stretching applied between the card outlet and the stretching roller.
  • the stretching device comprises a driving element for the at least one web, in particular a stretching roller, arranged between the web forming device and the spreader-lapper, the driving element comprising a driving surface intended to come into contact with the at least one web to drive it, and there is provided a suction device intended to provide suction to the driving surface to maintain by suction the at least one web against the driving surface .
  • the advantage of holding by adhesion linked to the stretching and suction/depression combination, compared to double pinching as in the prior art, is that the long fibers arranged generally in the direction of travel of the web, keep a certain freedom of relative movement allowing a more progressive application of stretching which limits the marking of the sail(s) and the sheet.
  • the drive element is a so-called stretching roller, part of the exterior surface of which constitutes the drive surface carrying out the transport of the web(s) between the exit belt(s) and the belt. input, the roller being controlled by rotation drive means to control its rotation speed to vary it according to the stretching that we wish to impart to the web, the latter itself being dependent on the transverse profile that we wish to obtain.
  • the use of a stretching roller makes it possible to obtain great precision regarding the area of application of the suction to the web(s) of fiber(s).
  • the suction device is arranged so that the thickness of the web(s) passing over the driving surface is not less than 50% of the thickness of the web directly in upstream of the roller, preferably is not less than 75% of its/their thickness directly upstream of the drive element, preferably is not less than 90%, even more preferably is substantially equal to the thickness directly upstream of the driving element and even more preferably is equal to its/their thickness directly upstream of the driving element, in particular the suction device being arranged to create, for a total surface mass of the sail(s) of between 20 and 100 g/m 2 , in particular between 30 and 80 g/m 2 , a depression of between 10 millibars and 100 millibars, in particular between 40 and 70 millibars.
  • the stretching roller is positioned downstream of a return roller of the or each exit belt to limit the distance over which the stretching force is applied between the return roller of the respective belt and the stretching roller.
  • two exit belts are provided from the web forming device, in particular the carding device, respectively upper and lower, and two upper and lower webs joining the stretching roller.
  • the peripheral linear speed (tangential) of the stretching roller varies in a speed range between 100 and 150% of the speed of the exit belt(s) of the web forming device, in particular the carding device, preferably between 100 and 140%.
  • the speed of the spreader-lapper entry belt is substantially equal to or equal to the peripheral speed of the stretching roller.
  • the entrance belt of the spreader-lapper drives the card web at a speed slightly higher than that of the periphery of the stretching roller, for example higher by 1 to 10%, the stretching being preferably constant and therefore independent of the variable stretching applied by the stretching roller.
  • the stretching roller is arranged at a distance from the return roller of the or each exit belt, preferably at most 1 meter from the roller or each return roller, and in particular at a distance between 50 mm and 300 mm .
  • the gap between the return roller of the exit belt or the upper exit belt of the web forming device and the stretching roller is between 5 and 20 mm, preferably between 7 and 15 mm, for a mass sail surface area between 10 and 50 g/m 2 , preferably between 20 and 40 g/m 2 .
  • the gap between the return roller of the second exit belt, or lower belt, and the stretching roller is between 10 and 30 mm, preferably between 15 and 25 mm, for a surface mass of sail between 15 and 25 mm, for a surface mass of sail of between 10 and 50 g/m 2 , preferably between 20 and 40 g/m2.
  • a card produces two webs 5 and 6 of non-woven fabric exiting the card via two card outlet belts 1 and 2, respectively upper and lower.
  • the upper and lower card exit belts 1 and 2 each comprise a respective return roller 3 and 4 rotating at a substantially identical and constant speed.
  • the two webs 5 and 6 coming from the two card outlet belts 1 and 2 are conveyed to the entrance belt 7 of a spreader-lapper itself having a return roller 8.
  • the web 9 formed by the union of the two webs 5 and 6 is then treated in the spreader-lapper, and in particular spread in the form of sections transverse to each other to form at the outlet of the spreader-lapper a sheet of non -woven.
  • the two webs are transported by a stretching roller 10 driven in rotation by a motor controlled by a control system to modify the speed of rotation of the stretching roller 10 to stretch the card web to a greater or lesser extent depending on needs, and in particular to adjust the transverse thickness profile of the web formed at the outlet of the spreader-lapper.
  • the return rollers 3 and 4 of the two carding belts rotate at substantially the same speed, in particular constant, while the stretching roller 10 rotates at a variable peripheral speed as a function of time, in particular periodic, greater than that of the card outlet belts 1 and 2, to thus achieve stretching of the sails 5 and 6.
  • the input belt 7 advances at a speed substantially equal to that of the stretching roller 10.
  • the path of the upper web 5 between the upper exit belt 1 and the entrance belt 7 of the spreader-lapper is such that it passes over part of the exterior surface of the roller 10.
  • the arrangement is produced in such a way that a point 11 of inflection is formed between the exit roller 3 of the exit belt 1 and the entry roller 8 of the entrance belt 7 of the spreader-lapper.
  • the system can also be improved by providing that the roller 10 is suction to help guide the two sails 5 and 6 between the rollers 3 and 4 and the input belt 7.
  • each exit belt 1 and 2 is inclined relative to the entrance belt 7 of the spreader-lapper.
  • the exit end point of each belt 4 and 5 is offset in height relative to, in particular is above the, entry end point of the belt 7 entering the spreader-lapper.
  • the end or return rollers 3 and 4 of each exit belt, in particular their respective axes 13 and 14, are arranged offset in height relative to, in particular above the, end or return roller 8 of the spreader-lapper, in particular with respect to its axis 15.
  • the upper web 5 comes into contact with the exterior surface of the roller 10 and moves along this exterior surface to the entrance belt 7 of the spreader-lapper.
  • the web 6 comes into contact with the upper web 5, itself in contact with the exterior surface of the roller 10 and moves with the web 5 along this exterior surface up to the belt 7 d entrance to the spreader-lapper.
  • the gap between the roller 10 and the roller 3 is greater than the sum of the thicknesses of the carpet 1 and the web 5, so that no pinching force is exerted on the web 5 at this gap.
  • this gap can be between 5 and 20 mm, for example between 7 and 15 mm, for a surface mass of the web of between 10 and 50 g/m 2 , preferably between 20 and 40 g/m 2 .
  • the gap between roller 10 and roller 4 is greater than the sum of the thicknesses of the carpet 2, the web 5 and the web 6, so that no pinching force is exerted on the two webs 5 and 6 at this gap.
  • this gap can be between 10 and 30 mm, for example between 15 and 25 mm, for a surface mass of the web of between 10 and 50 g/m 2 , preferably between 20 and 40 g/m 2 .
  • the gap between the roller 10 and the roller 8 is greater than the sum of the thicknesses of the carpet 7 and the web 9, so that no pinching force is exerted on the web 9 at this gap.
  • a stretching device has been provided in the form of a cylindrical roller.
  • an element of any other geometric shape could be provided, the important thing being to form a driving surface in contact with the web 5 to convey it between the roller 3 and the roller 8 by stretching the web 5.
  • the portion of the belt 1 before the return roller 3 is inclined downwards towards the roller 3, while the portion of the belt 7 is inclined in the other direction, that is to say upwards from of the return roller 8.
  • the portion of the belt 2 before the return roller 4 is substantially horizontal.
  • a card produces a veil 5' of non-woven fibers exiting the card via a card exit belt 1'.
  • the card exit belt 1' comprises a return roller 3' rotating at a substantially constant speed.
  • the web 5' from the card is conveyed to the entrance belt 7' of a spreader-lapper itself having a return roller 8'.
  • the web 5' is then treated in the spreader-lapper, and in particular spread in the form of sections transverse to each other to form a sheet of non-woven material at the outlet of the spreader-lapper.
  • the web is transported by a stretching roller 10' driven in rotation by a motor controlled by a control system to modify the speed of rotation of the stretching roller 10' to stretch the card web to a greater or lesser extent depending on needs, and in particular to adjust the transverse thickness profile of the sheet formed at the outlet of the spreader-lapper.
  • the return roller 3' of the carding belt rotates substantially at a constant speed, while the stretching roller 10' has a peripheral speed which varies as a function of time, in particular periodic, greater than that of the carding exit belt 1', for thus carry out a stretching of the web 5', the stretched web entering the lapper spreader bearing the reference 9' at the figure 2 .
  • the 7' entrance mat advances at a speed substantially equal to that of the stretching roller 10'.
  • the path of the web 5' between the upper exit belt 1' and the entrance belt 7' of the spreader-lapper is such that it passes over part of the lower surface of the roller 10', in particular over a sector of angle between 60° and 100°.
  • the roller 10' is suction to help guide the web 5' between the roller 4' and the input belt 7' and to hold it against the surface of the roller 10' during stretching.
  • a suction sector 17 connected to a fan not shown creates the depression inside the roller 10' to obtain the depression necessary to maintain the veil 5' against the lower surface of the roller 10'.
  • the suction sector 17 and its associated fan are arranged so that the thickness of the web 5' passing over the surface of the roller 10' is not less than 50% of the thickness of the web 5' directly upstream of the roller, preferably is not less than 75% of its thickness directly upstream of the roller, preferably is not less than 90%, even more preferably is substantially equal to the thickness directly upstream of the roller and even more preferably is equal to its thickness directly upstream of the roller 10'.
  • the suction sector 17 and its associated fan are sized to create, for a surface mass of the veil of between 20 and 100 g/m 2 , in particular between 40 and 80 g/m 2 , a depression of between 10 millibars and 100 millibars, in particular between 40 and 70 millibars.
  • the web 5' comes into contact with the lower surface of the roller 10' and moves along this surface towards the entrance belt 7' of the spreader-lapper.
  • the gap between the roller 10' and the belt 1' is greater than the thickness of the web 5', so that no pinching force is exerted on the web 5' at this gap.
  • this gap can be between 5 and 20 mm, for example between 7 and 15 mm for a surface mass of the web of between 10 and 50 g/m 2 , preferably between 20 and 40 g/m 2 .
  • the gap between the roller 10' and the roller 8' is greater than the thickness of the web 9', so that no pinching force is exerted on the web 9' at this gap.
  • a card produces a 5" web of non-woven fibers exiting the card through a 1" card exit belt.
  • the 1" card exit belt includes a 3" return roller rotating at a substantially constant speed.
  • the 5" veil from the card is routed to the 7" belt input of a spreader-lapper itself having an 8" return roller.
  • the 5" web is then treated in the spreader-lapper, and in particular spread in the form of sections transverse to each other to form a sheet of non-woven material at the outlet of the spreader-lapper.
  • the web is transported by a 10" stretching roller driven in rotation by a motor controlled by a control system to modify the rotation speed of the 10" stretching roller to stretch the card web to a greater or lesser extent depending on needs, and in particular to adjust the transverse thickness profile of the web formed at the outlet of the spreader-lapper.
  • the 3" return roller of the carding belt rotates substantially at a constant speed, while the 10" stretching roller has a peripheral speed which varies as a function of time, in particular periodic, greater than that of the 1" carding exit belt, to thus achieve a stretching of the 5" web, the stretched web entering the lapper spreader bearing the reference 9" at the Figure 4 .
  • the 7" input belt advances at a speed substantially equal to that of the 10" stretching roller.
  • the path of the 5" veil between the 1" exit belt upper and the 7" entrance belt of the spreader-lapper is such that it passes over part of the lower surface of the 10" roller, in particular over an angle sector of between 60° and 100°.
  • the 10'' roller is suction to help guide the 5" web between the 1" belt and the 7" entrance belt and hold it against the surface of the 10" roller during stretching.
  • a suction sector 18 connected to a fan not shown creates the depression inside the roller 10" to obtain the depression necessary to maintain the veil 5" against the lower surface of the roller 10''.
  • the suction sector 18 and its associated fan are dimensioned so that the thickness of the 5" web passing over the surface of the 10" roller is not less than 50% of the thickness of the 5" web directly upstream of the roller, preferably is not less than 75% of its thickness directly upstream of the roller, preferably is not less than 90%, even more preferably is substantially equal to the thickness directly upstream of the roller and even more preferably is equal to its thickness directly upstream of the roller 10", in particular the suction sector 18 and its associated fan are dimensioned to create, for a surface mass of the web of between 20 and 100 g/m 2 , in particular between 30 and 80 g/m 2 m 2 , a depression between 10 millibars and 100 millibars, in particular between 40 and 70 millibars.
  • the 5" web comes into contact with the lower surface of the 10" roller and moves along this surface towards the 7" entrance belt. the spreader-lapper.
  • the gap between the 10" roller and the 1" belt is greater than the thickness of the 5'' web, so that no pinching force is exerted on the 5'' web at this gap.
  • this gap can be between 5 and 20 mm, for example between 7 and 15 mm for a surface mass of the web of between 10 and 50 g/m 2 , preferably between 20 and 40 g/m 2 .
  • the gap between the 10" roller and the 8" roller is greater than the thickness of the 9" web, so that no pinching force is exerted on the 9" web at this gap.
  • a suction box 16 connected to a fan not shown is also arranged at the level of the belt 1" to ensure auxiliary holding by suction of the web 5" against a part of the upper surface of the belt 1".
  • the suction box 16 is arranged to so that the thickness of the veil 5'' downstream of the fan is not less than 50% of the thickness of the veil 5'' directly upstream of the box 16, preferably not less than 75% of its thickness directly upstream of the box 16, preferably is not less than 90%, even more preferably is substantially equal to the thickness directly upstream of the box 16 and even more preferably is equal to its thickness directly upstream of the box 16
  • the suction box 16 and its associated fan are dimensioned to create, for a surface mass of the 5" veil of between 20 and 100 g/m 2 , in particular between 30 and 80 g/m 2 , a depression of between 10 millibars and 100 millibars, notably included between 40 and 70 millibars.
  • a card produces a web 50 of non-woven fibers exiting the card via a card exit belt 100.
  • the card exit belt 100 comprises a return roller 30 rotating at a substantially constant speed.
  • the web 50 from the card is conveyed to the entrance belt 70 of a spreader-lapper itself having a return roller 80.
  • the web 50 is then treated in the spreader-lapper, and in particular spread in the form of sections transverse to each other to form a sheet of non-woven material at the outlet of the spreader-lapper.
  • the web is transported by an endless belt 110 driven by a motor controlled by a control system to modify the speed of the belt without end 110 to stretch the card web more or less depending on needs, and in particular to adjust the transverse thickness profile of the sheet formed at the outlet of the spreader-lapper.
  • the return roller 30 of the carding belt rotates substantially at a constant speed, while the endless belt 110 has a variable speed as a function of time, in particular periodic, greater than that of the carding exit belt 100, to thus achieve a stretching of the web 50, the stretched web entering the spreader-lapper carrying reference 90 to Figure 5 .
  • the input belt 70 advances at a speed substantially equal to that of the endless belt 110.
  • the path of the web between the upper exit belt 100 and the entrance belt 70 of the spreader-lapper is such that it passes over part of the lower surface of the endless belt 110.
  • the endless belt 110 is suction to help guide the web between the belt 100 and the entrance belt 70 and to hold it against the surface of the belt 110 during stretching.
  • a suction box 111 connected to a fan not shown creates the depression inside the endless belt 110 to obtain the depression necessary to maintain the veil against the lower surface of the endless belt 110.
  • the suction box 111 and its associated fan are dimensioned so that the thickness of the web 50 passing over the surface of the endless belt 110 is not less than 50% of the thickness of the web 50 directly upstream of the endless belt, preferably not is not less than 75% of its thickness directly upstream of the endless belt, preferably is not less than 90%, even more preferably is substantially equal to the thickness directly upstream of the endless belt and even more preferably is equal to its thickness directly upstream of the endless belt 110.
  • the box aspirator 111 is arranged to create, for a surface mass of the veil of between 20 and 100 g/m 2 , in particular between 30 and 80 g/m 2 , a depression of between 10 millibars and 100 millibars, in particular between 40 and 70 millibars .
  • the web 50 comes into contact with the lower surface of the endless belt 110 and moves along this surface towards the belt 70 at the entrance of the spreader-lapper.
  • the gap between the endless belt 110 and the belt 100 or the roller 30 is greater than the thickness of the web 50, so that no pinching force is exerted on the web 50 at this gap.
  • this gap can be between 5 and 20 mm, for example between 7 and 15 mm for a surface mass of the web of between 10 and 50 g/m 2 , preferably between 20 and 40 g/m 2 .
  • the gap between the endless belt 110 and the belt 70 or the roller 80 is greater than the thickness of the web 90, so that no pinching force is exerted on the web 90 at this gap.
  • This periodic profile (a single period is represented in the Figure 3 ) of speed makes it possible to obtain a sheet having a transverse profile of uniform or substantially uniform thickness, that is to say a profile whose relative variation from one edge to the other of the thickness is not greater than 20%, preferably not more than 15%, even more preferably not more than 10%, most preferably not more than 5%, especially not more than 3%, or even 1 %.
  • the use of suction at the level of the stretching element makes it possible to avoid pinching the web to hold it during stretching and thus eliminate the harmful effects of pinching on the final web.
  • the present invention also targets embodiments in which one or more pinches would be provided, in combination with suction. Certainly, the quality of the web obtained would be reduced, but nevertheless greater than if no suction was provided.
  • One or more auxiliary suction(s) could also be provided in the path.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (15)

  1. Anlage zum Bilden einer Faserbahn, insbesondere einer Vliesstoffbahn, welche eine Vorrichtung zur Bildung eines Faservlieses (von Faservliesen), zum Beispiel eine Karde, einen Vliesleger und eine Vorrichtung zum Strecken (10) des oder der Faservliese, die zwischen der Vorrichtung zur Vliesbildung und dem Vliesleger angeordnet ist und die es ermöglicht, ein insbesondere in Abhängigkeit von der Zeit variables, insbesondere periodisches Strecken des oder der Faservliese durchzuführen, um so ein vorgegebenes gewünschtes Profil der Bahn am Auslauf des Vlieslegers einzustellen, umfasst, wobei die Vorrichtung zur Vliesbildung mindestens ein Auslaufband (1; 2) für mindestens ein Vlies (5; 6), vorzugsweise zwei Auslaufbänder (1, 2) für zwei Vliese (5, 6), ein oberes bzw. unteres, aufweist; wobei der Vliesleger ein Einlaufband (7) aufweist, das dazu bestimmt ist, das oder die von dem Auslaufband oder den Auslaufbändern der Vorrichtung zur Vliesbildung kommende(n) Vlies(e) aufzunehmen, dadurch gekennzeichnet, dass die Anordnung so beschaffen ist, dass der Weg des oder der Vliese(s), vorzugsweise der zwei Vliese, des oberen und des unteren, zwischen dem Auslaufband oder den Auslaufbändern der Vorrichtung zur Vliesbildung, insbesondere der Karde, und dem Einlaufband des Vlieslegers mindestens einen Wendepunkt (11; 12) aufweist.
  2. Anlage nach Anspruch 1, dadurch gekennzeichnet, dass die Streckvorrichtung eine Streckwalze (10) aufweist, wobei ein Teil von deren Außenfläche den Transport des oder der Vliese(s) zwischen dem Auslaufband oder den Auslaufbändern (1; 2) und dem Einlaufband (7) ausführt, wobei die Walze von Drehantriebsmitteln so gesteuert wird, dass ihre Umdrehungsgeschwindigkeit gesteuert wird, um deren Änderung in Abhängigkeit von der Streckung zu bewirken, welcher das Vlies (die Vliese) unterworfen werden soll(en).
  3. Anlage nach Anspruch 2, dadurch gekennzeichnet, dass die Vorrichtung zur Vliesbildung dafür eingerichtet ist zu bewirken, dass sich das Auslaufband oder die Auslaufbänder (1, 2) der Vorrichtung zur Vliesbildung mit einer konstanten oder im Wesentlichen konstanten Geschwindigkeit bewegen, während die Umfangsgeschwindigkeit der Streckwalze (10) so gesteuert wird, dass sich diese Letztere mit einer Geschwindigkeit dreht, die höher als die der Bänder (1, 2) und variabel in Abhängigkeit von der Streckung ist, welcher das Vlies (die Vliese) unterworfen werden soll(en).
  4. Anlage nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass sich das Einlaufband (7) des Vlieslegers mit einer Geschwindigkeit dreht, welche dieselbe wie diejenige des Umfangs der Streckwalze (10) ist.
  5. Anlage nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass das Einlaufband (7) des Vlieslegers das Vlies mit einer Geschwindigkeit antreibt, die etwas höher als diejenige des Umfangs der Streckwalze (10) ist, zum Beispiel um 1 % bis 10 % höher, das heißt, die Differenz zwischen den zwei Geschwindigkeiten wird im Wesentlichen konstant gehalten.
  6. Anlage nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass zwei Auslaufbänder (1, 2) von Vlies vorgesehen sind, insbesondere einer Karde, ein oberes bzw. unteres, wobei die zwei Vliese, das obere und das untere, sich an der Streckwalze vereinigen.
  7. Anlage nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, dass jedes Auslaufband (1; 2) bezüglich des Einlaufbandes (7) des Vlieslegers geneigt ist.
  8. Anlage nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, dass der Endpunkt des Auslaufs des oder jedes Auslaufbandes (1; 2) höhenversetzt bezüglich des Endpunktes des Einlaufs des Einlaufbandes (7) des Vlieslegers ist und sich insbesondere über diesem befindet.
  9. Anlage nach einem der Ansprüche 6 bis 8, darunter mindestens Anspruch 6,
    dadurch gekennzeichnet, dass am Ausgang der Umlenkwalze (3) des oberen Bandes (1) das obere Vlies (5) in Kontakt mit der Außenfläche der Streckwalze (10) kommt und sich entlang dieser Außenfläche bis zum Einlaufband (7) des Vlieslegers bewegt.
  10. Anlage nach einem der Ansprüche 2 bis 9, darunter mindestens Anspruch 2,
    dadurch gekennzeichnet, dass vorgesehen ist, die Streckwalze mit einer Hülse aus einem Material zu bedecken, welches Haftvermögen an dem (den) Vlies(en) verleiht.
  11. Anlage nach einem der Ansprüche 2 bis 10, darunter mindestens Anspruch 2,
    dadurch gekennzeichnet, dass die lineare oder tangentiale Umfangsgeschwindigkeit der Streckwalze in einem Geschwindigkeitsbereich zwischen 100 und 150 % der Geschwindigkeit des oder der Auslaufbänder der Vorrichtung zur Vliesbildung, insbesondere Karde, variiert, vorzugsweise zwischen 100 und 140 %.
  12. Anlage nach einem der Ansprüche 2 bis 11, darunter mindestens Anspruch 2,
    dadurch gekennzeichnet, dass die Streckwalze (10) in einem Abstand von der Umlenkwalze (3, 4) des oder jedes Auslaufbandes angeordnet ist, vorzugsweise in höchstens 1 Meter Abstand von der Umlenkwalze oder jeder Umlenkwalze und insbesondere in einem Abstand zwischen 50 mm und 300 mm.
  13. Anlage nach einem der Ansprüche 2 bis 12, darunter mindestens die Ansprüche 2 und 6,
    dadurch gekennzeichnet, dass der Spalt zwischen der Umlenkwalze (4, 3) des Auslaufbandes oder des oberen Auslaufbandes der Vorrichtung zur Vliesbildung und der Streckwalze (10) zwischen 5 und 20 mm beträgt, vorzugsweise zwischen 7 und 15 mm, für eine flächenbezogene Masse des Vlieses zwischen 10 und 50 g/m2, vorzugsweise zwischen 20 und 40 g/m2.
  14. Anlage nach einem der Ansprüche 6 bis 12, darunter mindestens Anspruch 6,
    dadurch gekennzeichnet, dass der Spalt zwischen der Umlenkwalze (4) des unteren Auslaufbandes und der Streckwalze (10) zwischen 10 und 30 mm beträgt, vorzugsweise zwischen 15 und 25 mm, für eine flächenbezogene Masse des Vlieses zwischen 10 und 50 g/m2, vorzugsweise zwischen 20 und 40 g/m2.
  15. Anlage nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Streckvorrichtung ein Element zum Antrieb des mindestens einen Vlieses aufweist, insbesondere eine Streckwalze, die zwischen der Vorrichtung zur Vliesbildung und dem Vliesleger angeordnet ist, wobei das Antriebselement eine Antriebsfläche aufweist, die dazu bestimmt ist, mit dem mindestens einen Vlies in Kontakt zu kommen, um es anzutreiben, und dadurch, dass eine Ansaugvorrichtung vorgesehen ist, die dazu bestimmt ist, eine Ansaugung an der Antriebsfläche durchzuführen, um das mindestens eine Vlies durch Ansaugen an der Antriebsfläche anliegend zu halten.
EP17804493.9A 2016-11-25 2017-11-14 Vorrichtung zum strecken einer bahn zwischen einer kardiervorrichtung und einem kreuzleger Active EP3545122B1 (de)

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FR1670710A FR3059344B1 (fr) 2016-11-25 2016-11-25 Dispositif d'etirage d'un voile dispose entre un dispositif de carde et un etaleur nappeur
FR1771155A FR3059343B1 (fr) 2016-11-25 2017-10-31 Installation pour former une nappe de fibres comportant au moins un dispositif de formation de voile, notamment une carde, et un etaleur-nappeur
PCT/EP2017/079227 WO2018095766A2 (fr) 2016-11-25 2017-11-14 Dispositif d'étirage d'un voile disposé entre un dispositif de carde et un étaleur nappeur.

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EP24161459.3A Division EP4357497A2 (de) 2016-11-25 2017-11-14 Vorrichtung zum strecken eines zwischen einer kardenvorrichtung und einem vliesleger angeordneten segels

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CN (1) CN109996910B (de)
CA (1) CA3043266A1 (de)
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FR3081885B1 (fr) * 2018-05-31 2020-09-11 Andritz Asselin Thibeau Systeme de formation d’une nappe de fibres
EP3908687B1 (de) 2019-01-08 2023-05-31 ANDRITZ Perfojet SAS Einheit und verfahren zur herstellung von vliesstoffen
FR3098527B1 (fr) * 2019-07-11 2021-07-23 Andritz Asselin Thibeau Dispositif de transfert et/ou d'introduction d'une nappe de fibres, notamment d'une nappe de non-tissé, dans une installation de consolidation, notamment une aiguilleteuse

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CN109996910A (zh) 2019-07-09
WO2018095766A3 (fr) 2018-07-26
WO2018095766A2 (fr) 2018-05-31
US20240117532A1 (en) 2024-04-11
CA3043266A1 (fr) 2018-05-31
US11885046B2 (en) 2024-01-30
FR3059344B1 (fr) 2019-11-22
FR3059343B1 (fr) 2019-04-05
FR3059343A1 (fr) 2018-06-01
CN109996910B (zh) 2022-06-10
EP3545122C0 (de) 2024-04-10
US20190271102A1 (en) 2019-09-05
EP3545122A2 (de) 2019-10-02
FR3059344A1 (fr) 2018-06-01
EP4357497A2 (de) 2024-04-24

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