EP3450603B1 - Procédé de formation d'un non-tissé profilé - Google Patents

Procédé de formation d'un non-tissé profilé Download PDF

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Publication number
EP3450603B1
EP3450603B1 EP17189022.1A EP17189022A EP3450603B1 EP 3450603 B1 EP3450603 B1 EP 3450603B1 EP 17189022 A EP17189022 A EP 17189022A EP 3450603 B1 EP3450603 B1 EP 3450603B1
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EP
European Patent Office
Prior art keywords
nonwoven
profiled
roller
breaking
fabric
Prior art date
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Application number
EP17189022.1A
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German (de)
English (en)
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EP3450603A1 (fr
Inventor
Johann Philipp Dilo
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.)
Oskar Dilo Maschinenfabrik KG
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Oskar Dilo Maschinenfabrik KG
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Priority to EP17189022.1A priority Critical patent/EP3450603B1/fr
Priority to CN201810918969.5A priority patent/CN109423775B/zh
Publication of EP3450603A1 publication Critical patent/EP3450603A1/fr
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Publication of EP3450603B1 publication Critical patent/EP3450603B1/fr
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Classifications

    • 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
    • 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
    • D04H1/72—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 randomly arranged
    • D04H1/736—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 randomly arranged characterised by the apparatus for arranging fibres
    • 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
    • D01G23/02—Hoppers; Delivery shoots
    • 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
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D04H3/105—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by needling
    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
    • 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
    • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
    • D04H5/08—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of fibres or yarns

Definitions

  • the present invention relates to a method for forming a profiled fleece.
  • nonwoven In certain areas of nonwoven application, it may be desirable to produce a nonwoven that has a predetermined non-uniform cross profile and / or longitudinal profile.
  • One application example is the production of interior lining elements for motor vehicles.
  • EP 2 695 976 A1 describes a feed device for feeding dissolved fibers onto a transport device which has a plurality of feed segments arranged horizontally next to one another. Each feed segment is assigned a separately controllable feed roller that draws in the respective fiber base material, which is then broken up into individual fibers or fiber flakes by means of an opening roller and scattered onto the transport device. In this way, a profiled nonwoven web can be produced by differently controlling the feed rollers in the feed segments.
  • the present invention has for its object to provide a method for forming a profiled fleece, with which a fleece with a high stability is guaranteed both in the longitudinal and in the transverse direction of the fleece and with which smooth transitions between differently high areas of the fleece produced can be achieved.
  • the opening unit has at least one opening roller provided with teeth or pins.
  • the opening roller can redissolve the profiled nonwoven intermediate product particularly well in fibers or fiber flakes.
  • the at least one opening roller preferably sprinkles the dissolved fibers or fiber flakes of the nonwoven intermediate product onto the base nonwoven or the conveying device. During the scattering process, transitions between fleece sections, which were generated by adjacent feed segments, are drawn more smoothly. In addition, fiber bridges are formed in all directions.
  • the at least one opening roller has a speed of at least 200 revolutions / min, preferably at least 500 revolutions / min, more preferably at least 1,000 revolutions / min, more preferably at least 2,000 revolutions / min, even more preferably at least 3,000 revolutions / min .
  • Such high revolutions result in a particularly strong dissolution of the profiled nonwoven intermediate product into individual fibers or fiber flakes.
  • the opening unit preferably also has at least one feed roller.
  • the feed roller brings about a targeted feeding of the nonwoven intermediate product to be dissolved to the opening roller.
  • the opening unit also preferably has a trough.
  • the trough supports the at least one feed roller in the targeted feeding of the nonwoven intermediate product to the dissolving unit.
  • the profiled nonwoven intermediate product is fed to the dissolving unit at a speed which essentially corresponds to the speed at which the profiled nonwoven is conveyed after the dissolving unit. In this way, constant mass flow is achieved.
  • an additional nonwoven can also be deposited from above on the fibers or fiber flakes fed by the feed device.
  • the feed device comprises feed segments arranged horizontally next to one another, which are preferably arranged next to one another in a direction transverse to a transport direction of the starting fleece or of the transport device. In this way, a desired cross profile of the nonwoven intermediate product can be generated in a simple manner transverse to the direction of transport.
  • Each feed segment preferably has a width of between 5 and 100 mm, more preferably between 10 and 50 mm, even more preferably between 20 and 25 mm. These areas have proven to be preferred areas in that a high level of scattering accuracy is achieved, while at the same time the mechanical implementation of the feed segments is still possible.
  • the feed device preferably has a plurality of individually controllable, driven feed rollers and at least one driven opening roller which interacts with the feed rollers, each feed segment being assigned its own feed roller.
  • a particularly exact profiling of the nonwoven intermediate product is achieved if each feed roller is fed with its own fiber sliver or its own nonwoven strip.
  • the profiled nonwoven intermediate product and the profiled nonwoven are each transported on a screen belt that is under suction.
  • the profiled nonwoven is subsequently consolidated in a consolidation device, preferably in a needle machine, more preferably in a double-needle machine, whereby a profiled, consolidated nonwoven product is formed.
  • nonwoven intermediate product also includes discontinuous fiber accumulations.
  • the nonwoven intermediate product can be formed by nonwoven strips spaced apart from one another.
  • a profiled nonwoven intermediate product 78 is formed on a transport device 10, which is preferably moved continuously in the transport direction T, by means of a feed device 22.
  • the transport device 10 can be designed as a conveyor belt and preferably as a screen belt that is sucked under.
  • the speed of the transport device 10 is preferably in the range from 0.2 to 20 m / min, more preferably in the range from 0.5 to 10 m / min.
  • the profiled nonwoven intermediate product 78 can be profiled as desired both transversely to the transport direction T and in the transport direction T. The profiling of the nonwoven intermediate product 78 is only indicated by a schematically illustrated step shape.
  • the feed device 22 which preferably has a plurality of feed segments 23 arranged horizontally next to one another (see FIG Fig. 2 ), different amounts of fibers or fiber flakes per feed segment 23 are specifically fed onto the transport device 10. Details of the feeder 22 are given below with reference to FIG 2 to 4 described.
  • a measuring device 14 can measure the mass per unit area of the nonwoven intermediate product 78 formed over its width running transversely to the transport direction T, in order thus to measure the transverse profile and, due to the movement of the transport device 10, also the longitudinal profile of the formed nonwoven intermediate 78 to determine.
  • the measuring device 14 preferably comprises a plurality of measuring segments transverse to the transport direction T of the transport device 10 and a separate measurement is carried out in each measuring segment. In this way, the profile can be determined two-dimensionally, that is to say in the longitudinal and transverse directions.
  • the width of such a measuring segment is between 5 and 100 mm, preferably between 15 and 50 mm, more preferably between 20 and 25 mm.
  • a belt scale can also be used.
  • the measuring device 14 can be designed in the form of a mechanical measuring device. It is also possible to design the measuring device 14 as a radiometric measuring device. In this case, either a radiometric measuring probe is arranged in each measuring segment, which determines the basis weight of the nonwoven intermediate product 78 in the respective measuring segment via radiometric measurements, or a single radiometric measuring probe is provided which can be moved across the width of the nonwoven intermediate product 78 and absorbs the basis weight of the nonwoven intermediate 78 continuously or at certain measuring intervals. A combined use of both a radiometric and a mechanical measuring device 14 is also possible.
  • the results of the measuring device 14 are transmitted to a control or regulating device 20, which controls the feed device 22 on the basis of the results of the measuring device 14 in order to deliver the desired non-uniform cross profile and / or longitudinal profile of the nonwoven intermediate product 78.
  • the profiled nonwoven intermediate product 78 is then fed to a dissolving unit 40, which dissolves the profiled nonwoven intermediate product 78 in fibers or fiber flakes.
  • the disintegration unit 40 comprises at least one disintegration roller 42 provided with teeth or pins, which preferably as a turbo roller with a speed of at least 200 revolutions / min, preferably at least 500 revolutions / min, more preferably at least 1,000 revolutions / min, more preferably at least 2,000 revolutions / min, more preferably at least 3,000 revolutions / min.
  • the opening roller 42 is preferably designed to be continuous over the entire width of the profiled nonwoven intermediate product 78, but can also consist of several segments lying side by side.
  • the rotational speed of the opening roller 42 is at least 200 m / min, preferably at least 500 m / min, more preferably at least 1,000 m / min , and more preferably at least 2,000 m / min.
  • the dissolving unit 40 comprises at least one feed roller 43, which serves to convey the incoming profiled nonwoven intermediate product 78 to the dissolving roller 42.
  • the feed roller 43 and the opening roller 42 have an opposite direction of rotation.
  • Exactly one feed roller 43 is preferably present, which runs over the entire width of the profiled nonwoven intermediate product 78.
  • a plurality of feed rollers 43 can also be arranged side by side, which can be driven together or separately.
  • a trough 44 supports the targeted feeding of the profiled nonwoven intermediate product 78 through the feed roller 43.
  • the trough 44 is designed as an overhead trough, but it can also be arranged under the feed roller 43.
  • the feed roller 43 preferably runs at the same speed as the transport device 10.
  • An auxiliary roller 45 can also be arranged in the transition between the transport device 10 and the feed roller 43.
  • the fibers or fiber flakes dissolved by the dissolving unit 40 are scattered as a profiled fiber accumulation 50 onto a base fleece 66 which is transported in a conveying direction F on a conveying device 16 below the dissolving unit 40.
  • the base web 66 is preferably provided on a base web roll 68 in the form of a roll and is pulled off from there in the direction of the opening unit 40.
  • the conveying direction F and the transport direction T are preferably identical, but can also be different.
  • the speed of unrolling the base nonwoven 66 preferably corresponds to the speed of the conveyor 16.
  • the conveyor device 16 is preferably designed as a sieve belt, which is equipped with a suction 70.
  • the under suction 70 must in any case be present in the area of the feed point of the fibers or fiber flocks fed by the dissolving unit 40, but is preferably along the entire conveying path of the conveying device 16 available to ensure safe transport of the fiber masses without blowing.
  • a covering fleece 72 can also be deposited from above on the fibers or fiber flakes that are dissolved and supplied by the dissolving unit 40.
  • the cover fleece 72 is in turn preferably stored in the form of a roll on a cover fleece roll 74 and can be pulled off from there in the conveying direction F.
  • the speed of the unrolling of the covering fleece 72 preferably corresponds to the conveying speed of the conveying device 16.
  • the profiled fleece 80 formed can be measured in the region of the conveyor device 16 by a measuring unit 84.
  • the measuring unit 84 is preferably designed as described above with regard to the measuring device 14.
  • the results of the measuring unit 84 are preferably transferred to the control or regulating device 20.
  • the profiled fleece 80 can be consolidated in a consolidation device 88, whereby a profiled, consolidated fleece product 90 is produced.
  • the consolidation device 88 is preferably designed as a needle machine, more preferably as a double needle machine.
  • Such a consolidation device 88 typically has a pair of feed rollers 92 and a pair of feed rollers 93.
  • the profiled, consolidated nonwoven product 90 formed during the consolidation can then be wound up again into a roll 86, for example by means of a peripheral winder 94.
  • the consolidation device 88 it is also possible for the consolidation device 88 to apply thermal consolidation. Chemical impregnation with subsequent drying would also be conceivable. In addition to the winding of the end product shown, it is also possible to cut the profiled, consolidated nonwoven product 90 into individual parts in a punch. It is also conceivable to feed the profiled, consolidated nonwoven product 90 to a deep-drawing device. Finally, it is also conceivable to already feed the profiled fleece 80 to another processing, for example in a card, without solidification.
  • an additional fleece (not shown) can also be deposited from above onto the fibers or fiber flakes fed by the feed device 22 in order to form the fleece intermediate product 78.
  • the feed unit 22 can feed the fibers onto a starting fleece 12 (see Fig. 2 ) and thus form the profiled nonwoven intermediate 78.
  • the fiber material can also be sprinkled directly onto the conveyor device 16.
  • the profiled nonwoven intermediate 78 can be formed solely by scattering or feeding fibers or fiber flakes in a 3D profile onto a transport device 10. Likewise, the profiled nonwoven intermediate 78 can be formed by feeding fibers or fiber flakes in a 3D profile an existing starting nonwoven 12. In both of the above cases, an additional nonwoven can be placed on top of the profiled fiber accumulation. Finally, the profiled nonwoven intermediate product 78 can also be formed by feeding fibers or fiber flakes in a feed device 22, which feeds fibers or fiber flakes evenly, and by later targeted removal (e.g. suction) of fibers or fiber flakes at certain points to produce the profile Fiber extraction.
  • later targeted removal e.g. suction
  • the profiled fleece 80 For the formation of the profiled fleece 80, there is first the possibility of dissolving the profiled fleece intermediate 78 as a profiled fiber accumulation 50 directly onto a conveyor device 16. There is also the in Fig. 1 Possibility shown to deposit the fibers or fiber flakes of the profiled nonwoven intermediate product 78 dissolved in the dissolving unit 40 onto a basic nonwoven 66. In both of the aforementioned cases, it is possible to cover the profiled fiber accumulation 50 from above by a covering fleece 72 in order to finally obtain the profiled fleece 80.
  • the nonwoven intermediate product 78, the base nonwoven 66 and / or the covering nonwoven 72 can differ from one another in terms of material properties, thickness, stack lengths, etc. By selecting them, the profiled fleece 80 can be given specific properties.
  • the nonwoven intermediate product 78 can also already consist of different layers, which then mix with one another in the dissolving process in the dissolving unit 40.
  • a fiber flake feeder 2 is provided in front of the feed device 22 for producing the starting fleece 12 (here in the form of a fiber flake mat).
  • the fiber flock feeder 2 can be configured in any commercially available variant and, in the example shown, has a discharge roller 48 which extends across the width of the transport device 10 at the lower end.
  • the transport device 10 moves the produced nonwoven 12 to the feed device 22.
  • the feed device 22 is in the case of Fig. 2 also designed as a fiber flake feeder.
  • This fiber flake feeder can be any commercially available fiber flake feeder, but has at its lower end a plurality of feed segments 23 arranged transversely to the transport direction T and horizontally next to one another, which can be controlled separately from one another.
  • Each feed segment 23 is assigned one of a plurality of discharge metering rollers 52 which are arranged alongside one another over the width of the starting mat 12 and can be controlled separately from one another.
  • the width of the feed segments 23, which essentially corresponds to the width of the discharge metering rollers 52, is preferably between 5 mm and 100 mm, more preferably between 15 and 50 mm, even more preferably between 20 and 25 mm.
  • the feed device 22 is filled with fiber flake material via a feed tube 54 which, as in the example shown, can branch off from a main feed line 60, just like the feed tube 58 of the fiber flake feeder 2.
  • a change flap 56 can switch between the two feed pipes 54, 58.
  • the two feed pipes 54, 58 can also be filled with fiber flake material via separate paths.
  • the discharge metering rollers 52 now - under certain circumstances also on the basis of the measurement results of the measuring device 14 ( Fig. 1 ) and / or the measuring unit 84 ( Fig. 1 ) - from each fiber flock material at the desired locations of the starting nonwoven 12 to form a fiber mass profile.
  • each discharge metering roller 52 is connected to its own servo motor 62. Any desired profiling of the nonwoven intermediate product 78 is hereby generated in a targeted manner.
  • the respective feed segments 23 of the feed device 22 are also arranged next to one another transversely to the transport direction T and are therefore not visible in the side view of the drawing.
  • Each feed segment is 23 a dispensing device 24 for storing and dispensing a fiber sliver 26 or a nonwoven strip is assigned.
  • the dispensing device 24 is designed as a spool, but it can also be designed as a spinning can or the like.
  • the fiber sliver 26 or the fiber fleece strip runs from the dispensing device 24, for example to a preferably rubberized storage roller 28, which extends transversely to the transport direction T and horizontally preferably over all feed segments 23, and is one turn of each fiber sliver 26 or each fiber fleece strip provided by the dispensing device 24 wrapped side by side around the storage roller 28.
  • the storage roller 28 is driven in one direction of rotation (see the corresponding arrow in the drawing), preferably by means of a servo motor 30 and likewise preferably continuously at a relatively slow speed. In certain embodiments, the storage roller 28 can also be omitted.
  • a one-piece storage roller 28 which simultaneously picks up the different strands of the fiber sliver 26 or the non-woven fiber strip of all the feed segments.
  • Each feed segment 23 is also assigned a feed roller 32 which is driven by a servo motor 34 and also rotates in the same direction of rotation.
  • the feed roller 32 pulls off the respective fiber sliver 26 provided by the associated dispensing device 24 or the nonwoven strips, either with the interposition of the storage roller 28 or directly.
  • each feed segment 23 has its own feed roller 32, only one feed roller 32 can be seen in the drawing due to the series arrangement.
  • Each feed roller 32 preferably has a clothing with teeth protruding rearward with respect to the direction of rotation.
  • a particular advantage of the interposition of the storage roller 28 lies in the fact that the storage roller 28 slips under those fiber slivers 26 or nonwoven strips that are only loosely wrapped around them. This applies accordingly to all feed segments in which the feed roller 32 is currently not driven at all or runs slower than the storage roller 28. Only when a feed roller 32 runs faster than the storage roller 28 is the corresponding winding of the fiber sliver 26 or the nonwoven strip around that Storage roller 28 pulled tight and the material is drawn in accordingly.
  • the feed rollers 32 can have all possible speed profiles, including a plateau profile (e.g. in the form of a truncated pyramid) with plateaus of the same height but of different lengths depending on the desired quantity of fiber material to be dispensed.
  • a plateau profile e.g. in the form of a truncated pyramid
  • the fiber sliver 26 or the nonwoven fabric strip moved along by the feed rollers 32 is preferably transported with the aid of a trough 33 to an opening roller 36, which is preferably formed in one piece and extends transversely to the transport direction T and horizontally across all feed segments 23. Likewise, however, there can be a separate opening roller per feed segment 23.
  • the opening roller 36 is driven in the same direction of rotation as the feed rollers 32.
  • the opening roller 36 preferably has a set of teeth which protrude forward with respect to the direction of rotation, as a result of which it opens the twisted or compressed fiber flock material of the fiber sliver 26 or the fiber fleece strip particularly well. so that loose fiber flakes or even fine fibers are removed. These fall into a corresponding delivery chute 38 and from there lead to the transport device 10.
  • a plurality of delivery chutes 38 can also be provided next to one another for the different feed segments.
  • the center points of the feed rollers 32 and the opening roller 36 are arranged on a horizontal line. In addition to the arrangement shown, there are still many design options.
  • Fig. 4 an enlarged view of an alternative embodiment of the feed device 22.
  • a plurality of horizontally juxtaposed feed rollers 32 are provided, which can be controlled individually and each fed separately with fiber material (not shown).
  • the fiber material conveyed up by the feed rollers 32 is fed with the aid of a trough 33, which is designed here as an overhead trough, to the opening roller 36, which removes the fibers or fiber flakes from the fiber material.
  • feed rollers 32 and opening rollers 36 have an opposite direction of rotation here.
  • a fan 35 may be arranged above the nip to to selectively convey the fibers or fiber flakes released from the opening roller 36 in the delivery shaft 38 downwards.
  • a discharge roller 37 is arranged at the lower end of the discharge chute 38, which is preferably designed as a suction roller that is sucked in behind.
  • the discharge roller 37 can also be designed only as a screen roller, without back suction.
  • a roller with a perforated roller jacket or a smooth roller are also conceivable as discharge roller 37.
  • a plurality of pedal depressions 39 which are biased by spring force in the direction of the discharge roller 37, are preferably provided for guiding the fibers or fiber flakes between the pedal recesses and the discharge roller 37.
  • a pedal depression 39 is preferably provided for each feed segment 23, and each of the pedal depressions 39 can be deflected individually. Because of the movable pedal troughs 39 and the back suction of the discharge roller 37, the individual fiber masses in the individual feed segments 23 can be fed in a particularly targeted manner.
  • the pedal troughs 39 can also be biased pneumatically or in some other way in the direction of the discharge roller 37.
  • the feed device 22 should preferably be movable over the width of the transport device 10.
  • Fig. 5 is a schematic representation of a section of a special system that can be used in the formation of a profiled fleece 80.
  • a pile is generated in a first card 102, which is laid in a first fleece layer 104 to an initial fleece 12.
  • a 3D profile of fibers is then fed onto the starting fleece 12 thus formed in a feed device 22.
  • An additional fleece is placed on this fiber accumulation from above by means of a second fleece layer 108, which is fed by a second card 106, in order to produce the profiled fleece intermediate 78.
  • This nonwoven intermediate product 78 is then fed to a dissolving unit 40 as previously described.
  • the supply of a base nonwoven 66 fed to the opening unit 40 can take place by means of a nonwoven layer, and the possible addition of a covering nonwoven 72 to the opening unit 40 can also take place by means of a nonwoven layer.
  • Fig. 6 shows a schematic representation of a section of a plant which can be used in the formation of a profiled, consolidated nonwoven product 90.
  • the fibers and fiber flakes dissolved by the dissolving unit 40 are first transported on a conveyor device 16.
  • a pre-needle machine 110 arranged on the side of the conveying device, a pre-needled basic nonwoven 66 is fed, on which the profiled fiber accumulation is deposited.
  • a second pre-needled fleece is supplied as a cover fleece 72 from above, so that ultimately a profiled fleece 80 is formed in a sandwich form, which is fed to a consolidation device 88.
  • the pre-needled fleece formed by the pre-needle machine 110 is cut through once in the middle in order to form the base fleece 66 and the cover fleece 72.
  • the pre-needled base nonwoven 66 and the pre-needled cover nonwoven 72 are then fed "around a corner" by guiding the base nonwoven 66 and the cover nonwoven 72 around a 90 degree curve.
  • the starting nonwoven 12 or the additional nonwoven which can be fed from above in front of the dissolving unit 40, as a pre-needled nonwoven.
  • FIG. 7 A possible configuration of the opening unit 40 is shown.
  • the nonwoven intermediate product 78 conveyed up by the feed roller 43 is fed to the opening roller 42 with the aid of a trough 63, which is designed here as an overhead trough, which releases the fibers or fiber flakes from the nonwoven intermediate product 78.
  • Feed roller 43 and opening roller 42 have the same direction of rotation here. But this can also be different.
  • the opening roller 42 carries the dissolved fiber material with it in the example shown (for example with the aid of a further overhead trough).
  • a blower 64 can on the feed roller 43 opposite side of the opening roller 42 can be arranged in order to selectively convey the dissolved fibers or fiber flakes in a delivery shaft 65 downwards from the opening roller 42. If there is no fan 64, the fibers or flakes of fiber fall into the discharge chute 65.
  • a discharge roller 67 is arranged at the lower end of the discharge chute 65, which is preferably designed as a suction roller that is suctioned behind.
  • the discharge roller 67 can, however, also be designed only as a screen roller, without back suction.
  • a roller with a perforated roller shell or a smooth roller are also conceivable as discharge roller 67.
  • a wall 69 is provided opposite the discharge roller 67 for guiding the fibers or fiber flakes. But it is also possible, similar to in Fig. 4 to provide several pedal depressions that can be individually deflected. When the discharge roller 67 is sucked in, a particularly targeted feed of the dissolved fiber masses is achieved.
  • the scattering can take place directly at the transfer point between the feed roller 43 and the opening roller 42 (not shown).
  • the output chute 65 would be below this nip and the direction of rotation of the opening roller 42 would be reversed.
  • the fan 64 could then be arranged over the nip.
  • a needle machine as the preferred form of a consolidation device 88 for consolidating the formed profiled fleece 80 and for producing the profiled, consolidated fleece product 90
  • the problem arises that the needles at thick points of the profiled fleece 80 have a longer needle path through the fiber material and thereby different places of the fleece more or less needle notches for engagement come. This would result in a higher compression in the area of a thick spot compared to a thin spot. This could be compensated for, for example, by the needles in the needling machine having only a single notch, which has filled up after a short puncture path and can then ineffectively continue through the fleece without additional compaction effects occurring at the thick points.
  • double-needle machines with which needling is carried out from above and from below, so that the previously produced profiled fleece 80 with its thick and thin places can be better guided through the constant distance between the perforated plates. It is preferred if the needle bars of the needle machine run through an elliptical movement path and thus do not prevent the fleece from being transported in the conveying direction during consolidation. This is the best way to avoid braking effects.
  • the feed device 22 can be controlled by means of the control or regulating device 20.
  • all other relevant machine parameters can also be controlled by the control or regulating device 20, such as speeds of all components involved in the formation of the fleece.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)

Claims (15)

  1. Procédé de formation d'un non-tissé profilé (80) avec les étapes :
    - d'amenée de fibres ou de flocons de fibres avec un dispositif d'amenée (22) sur un non-tissé de départ (12), qui est transporté vers le dispositif d'amenée (22), ou directement sur un dispositif de transport (10), et de formation d'un produit intermédiaire de non-tissé profilé (78) en incluant l'étape d'amenée,
    - d'ouvraison du produit intermédiaire de non-tissé profilé (78) dans une unité d'ouvraison (40) et d'amenée des fibres ou flocons de fibres ouverts du produit intermédiaire de non-tissé profilé (78) sur un non-tissé de base (66) ou directement sur un dispositif de convoyage (16), et de formation du non-tissé profilé (80) en incluant l'étape d'ouvraison et d'amenée.
  2. Procédé selon la revendication 1, caractérisé en ce que l'unité d'ouvraison (40) présente au moins un cylindre d'ouvraison (42) pourvu de dents ou de tiges.
  3. Procédé selon la revendication 2, caractérisé en ce que l'au moins un cylindre d'ouvraison (42) disperse les fibres ou flocons de fibres ouverts du produit intermédiaire de non-tissé (78) sur le non-tissé de base (66) ou le dispositif de convoyage (16).
  4. Procédé selon la revendication 2 ou 3, caractérisé en ce que l'au moins un cylindre d'ouvraison (42) présente une vitesse de rotation d'au moins 200 tours/min, de préférence d'au moins 500 tours/min, plus préférentiellement d'au moins 1000 tours/min, plus préférentiellement d'au moins 2000 tours/min, idéalement d'au moins 3000 tours/min.
  5. Procédé selon l'une quelconque des revendications 2 à 4, caractérisé en ce que l'unité d'ouvraison (40) présente en outre au moins un cylindre d'alimentation (43).
  6. Procédé selon la revendication 5, caractérisé en ce que l'unité d'ouvraison (40) présente en outre un creux (44) dans la zone de l'au moins un cylindre d'alimentation (43) .
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le produit intermédiaire de non-tissé profilé (78) de l'unité d'ouvraison (40) est amené à une vitesse qui correspond sensiblement à la vitesse à laquelle le non-tissé profilé (80) est convoyé après l'unité d'ouvraison (40).
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que, pour la formation du produit intermédiaire de non-tissé (78) avant l'unité d'ouvraison (40), un non-tissé supplémentaire est en outre posé par le haut sur les fibres ou flocons de fibres amenés par le dispositif d'amenée (22).
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que, pour la formation du non-tissé profilé (80) après l'unité d'ouvraison (40), un non-tissé de recouvrement (72) est en outre posé par le haut sur les fibres ou flocons de fibres qui sont ouverts et amenés par l'unité d'ouvraison (40).
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif d'amenée (22) présente plusieurs segments d'amenée (23) disposés horizontalement les uns à côté des autres, qui sont disposés les uns à côté des autres de préférence dans une direction transversale par rapport à une direction de transport (T) du non-tissé de départ (12) ou du dispositif de transport (10).
  11. Procédé selon la revendication 10, caractérisé en ce que chaque segment d'amenée (23) présente une largeur comprise entre 5 et 100 mm, de préférence entre 10 et 50 mm, plus préférablement entre 20 et 25 mm.
  12. Procédé selon la revendication 10 ou 11, caractérisé en ce que le dispositif d'amenée (22) présente une pluralité de cylindres d'alimentation (32) entraînés, pouvant être commandés individuellement, et au moins un cylindre ouvreur (36) entraîné coopérant avec les cylindres d'alimentation (32), dans lequel un cylindre d'alimentation (32) propre est associé à chaque segment d'amenée (23).
  13. Procédé selon la revendication 12, caractérisé en ce que chaque cylindre d'alimentation (32) est alimenté avec une mèche de fibres (26) propre ou une bande de voile fibreux propre.
  14. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de convoyage (16) est un tamis à bande à aspiration inférieure (70) .
  15. Procédé pour la formation d'un produit non-tissé encollé profilé (90) avec les étapes suivantes :
    la formation d'un non-tissé profilé (80) avec le procédé selon l'une quelconque des revendications précédentes et
    l'encollage du non-tissé profilé (80) dans un dispositif d'encollage (88), de préférence dans une aiguilleteuse, plus préférentiellement dans une double aiguilleteuse, ce faisant, la formation du produit non-tissé encollé profilé (90) .
EP17189022.1A 2017-09-01 2017-09-01 Procédé de formation d'un non-tissé profilé Active EP3450603B1 (fr)

Priority Applications (2)

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EP17189022.1A EP3450603B1 (fr) 2017-09-01 2017-09-01 Procédé de formation d'un non-tissé profilé
CN201810918969.5A CN109423775B (zh) 2017-09-01 2018-08-13 用于形成成型无纺布的方法

Applications Claiming Priority (1)

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EP17189022.1A EP3450603B1 (fr) 2017-09-01 2017-09-01 Procédé de formation d'un non-tissé profilé

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EP3739089B1 (fr) * 2019-05-16 2022-08-10 Oskar Dilo Maschinenfabrik KG Dispositif d'alimentation d'une installation de formation du non-tissé
CN110258027B (zh) * 2019-07-29 2024-04-09 孙健 一种节能环保的化妆棉生产设备
EP3954818B1 (fr) 2020-08-11 2023-02-22 Fameccanica.Data S.p.A. Procédé pour produire des éléments non tissés contenant du graphène et/ou de l'oxyde de graphène et élément non tissé associé

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DE29909016U1 (de) * 1999-05-26 2000-10-05 Autefa Maschinenfab Vliesanlage
DE10053622A1 (de) * 1999-10-29 2001-07-12 Ake Innotech Gmbh Automatisier Faserspender zur Herstellung von Faservliesen und seine Anwendung
DE20107004U1 (de) * 2001-04-23 2002-09-05 Autefa Automation Gmbh Profilbildungseinrichtung
DE10329648B4 (de) * 2003-07-01 2005-06-16 Oskar Dilo Maschinenfabrik Kg Vorrichtung zur Vliesbildung
DE10349531A1 (de) * 2003-10-22 2005-05-25 Fleissner Gmbh Verfahren zur Herstellung eines voluminösen Sandwichvlieses aus zumindest zwei Deckvliesen und mittiger Pulpschicht
DE102011120715A1 (de) * 2011-12-12 2013-06-13 Hubert Hergeth Vliesfräse
EP2695980A1 (fr) * 2012-08-06 2014-02-12 Oskar Dilo Maschinenfabrik KG Dispositif d'acheminement pour fibres ou flocons
EP2695982A1 (fr) 2012-08-06 2014-02-12 Oskar Dilo Maschinenfabrik KG Dispositif et méthode pour égaliser ou obtenir un profil donné à un matelas de flocons de fibres
DE102013106457B3 (de) * 2013-06-20 2014-09-04 Grimm-Schirp Gs Technologie Gmbh Kohlenstofffaser-Wirrvliesherstellungsverfahren und Dreidimensional-Vliesherstellungsverfahren sowie Kohlenstofffaser-Wirrvliesherstellungsanordnung und Faservlies
JP6269235B2 (ja) * 2014-03-26 2018-01-31 セイコーエプソン株式会社 シート製造装置

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CN109423775B (zh) 2022-07-08
EP3450603A1 (fr) 2019-03-06

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