EP4001488A1 - Dispositif de fabrication de tissus non tissés à partir de filaments continus - Google Patents

Dispositif de fabrication de tissus non tissés à partir de filaments continus Download PDF

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Publication number
EP4001488A1
EP4001488A1 EP20208671.6A EP20208671A EP4001488A1 EP 4001488 A1 EP4001488 A1 EP 4001488A1 EP 20208671 A EP20208671 A EP 20208671A EP 4001488 A1 EP4001488 A1 EP 4001488A1
Authority
EP
European Patent Office
Prior art keywords
roller
sieve belt
lifting
nose
distance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20208671.6A
Other languages
German (de)
English (en)
Other versions
EP4001488B1 (fr
EP4001488C0 (fr
Inventor
Tobias Wagner
Dirk Büttner
Alexander Klein
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.)
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Original Assignee
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Reifenhaeuser GmbH and Co KG Maschinenenfabrik filed Critical Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Priority to EP20208671.6A priority Critical patent/EP4001488B1/fr
Priority to ES20208671T priority patent/ES2980459T3/es
Priority to PL20208671.6T priority patent/PL4001488T3/pl
Priority to JP2021175253A priority patent/JP7772553B2/ja
Priority to KR1020210159418A priority patent/KR20220068941A/ko
Priority to US17/530,509 priority patent/US11598035B2/en
Priority to CN202111374384.XA priority patent/CN114541044A/zh
Publication of EP4001488A1 publication Critical patent/EP4001488A1/fr
Application granted granted Critical
Publication of EP4001488B1 publication Critical patent/EP4001488B1/fr
Publication of EP4001488C0 publication Critical patent/EP4001488C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/02—Advancing webs by friction roller
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D13/00—Complete machines for producing artificial threads
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
    • D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D01D5/098—Melt spinning methods with simultaneous stretching
    • D01D5/0985—Melt spinning methods with simultaneous stretching by means of a flowing gas (e.g. melt-blowing)
    • 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
    • D04H3/14—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 thermoplastic yarns or filaments produced by welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/25—Driving or guiding arrangements
    • B65H2404/256—Arrangement of endless belt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/26—Particular arrangement of belt, or belts
    • B65H2404/261—Arrangement of belts, or belt(s) / roller(s) facing each other for forming a transport nip
    • B65H2404/2614—Means for engaging or disengaging belts into or out of contact with opposite belts, rollers or balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/20—Belts
    • B65H2404/26—Particular arrangement of belt, or belts
    • B65H2404/262—Arrangements of belts facing rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/177—Fibrous or compressible material

Definitions

  • the invention relates to a device for producing nonwovens from continuous filaments, with a spinning device for spinning the filaments and a cooling device for cooling the filaments, with a sieve belt being provided, on which the filaments can be deposited in a deposition area to form a nonwoven web, wherein the depositing sieve belt can be deflected out of its transport direction in a deflection area by at least one nose roller, and there is at least one follower device for the fleece web downstream of the depositing sieve belt in the conveying direction of the fleece web.
  • the invention also relates to a method for transporting and treating a nonwoven web made of continuous filaments. - Due to their practically endless length, continuous filaments differ from staple fibers, which have significantly shorter lengths of, for example, 10 mm to 60 mm.
  • Devices and methods of the type mentioned at the outset are basically known in various embodiments from practice.
  • the filaments are spun by means of a spinning device, then cooled in a cooling device and finally deposited on a sieve belt to form a fleece web.
  • the depositing sieve belt of the devices known from practice is usually designed as an endlessly circulating depositing sieve belt, which is deflected from its transport direction by a nose roller in a deflection area. In this deflection area arranged at the end of the sieve belt, the fleece web is transferred from the sieve belt or the nose roller to a downstream device and is detached from the sieve belt in the deflection area.
  • the detachment of the fleece web from the sieve belt requires a relatively high force and is therefore not always possible in a simple and functionally reliable manner.
  • the continuous filaments can become jammed or trapped in the sieve belt, particularly in the deflection area, due to the strong deflection of the sieve belt.
  • the invention is based on the technical problem of specifying a device of the type mentioned at the outset, with which the nonwoven web can be detached from the deposit sieve belt in a simple and functionally reliable manner, with which in particular damage to the nonwoven web can be avoided during the detachment process and with the effort required for detachment of the fleece web can be reduced by the depositing screen belt.
  • the invention is also based on the technical problem of specifying a corresponding method for transporting and treating a fleece web.
  • the invention teaches a device for producing nonwovens from continuous filaments, with a spinning device for spinning the filaments and a cooling device for cooling the filaments being present, with a deposit sieve belt also being provided, on which the filaments are arranged in a deposit area to form a Fleece web can be removed in which the depositing sieve belt can be deflected out of its transport direction in a deflection area by at least one nose roller, with at least one follow-up device for the fleece web being provided downstream of the depositing sieve belt in the conveying direction of the nonwoven web, the fleece web being detachable from the depositing sieve belt in front of the deflection area and then to the following device is transferable.
  • the device according to the invention is characterized in that at least one lifting roller is provided for detaching the fleece web from the sieve belt, the lifting roller being or being arranged above the sieve belt, the fleece web being detachable from the sieve belt in a detachment area by means of the at least one lifting roller which is arranged at a distance A from the nose roller.
  • the spinning device according to the invention is designed in particular as a spinnerette.
  • the transport direction of the sieve belt means in particular the direction in which the sieve belt or endlessly circulating sieve belt moves to convey the nonwoven web.
  • the conveying direction of the nonwoven web means, in particular, the transport direction of the depositing sieve belt.
  • the deflection area means in particular the area at the end of the sieve belt, in which the sieve belt is deflected out of its transport direction by the nose roller and thus leaves its transport direction.
  • the detachment area or detachment area of the non-woven web means in particular the area in which the non-woven web is detached from the sieve belt.
  • the detachment area is a detachment line that extends in particular transversely, preferably perpendicularly, to the transport direction of the sieve belt.
  • the detachment area or the detachment line is preferably in front of the deflection area in the transport direction of the sieve belt and/or arranged in front of the nose roller.
  • the distance A is measured in particular between a projection of the axis of rotation of the nose roller on the sieve belt and the detachment area or the detachment line, with the projection of the axis of rotation being perpendicular to the longitudinal extent of the sieve belt in the area of the distance A.
  • the longitudinal extension of the depositing sieve belt means the extension in the direction of transport.
  • the depositing area appropriately means that area of the depositing sieve belt in which the spun filaments are deposited to form the fleece web.
  • the device according to the invention is a spunbond device, with a stretching device being provided for stretching the filaments.
  • a stretching device being provided for stretching the filaments.
  • Another embodiment of the invention is characterized in that the device according to the invention is a meltblown device.
  • spunbond fleeces or fleece webs are produced with the device according to the invention.
  • mono-component filaments and/or multi-component filaments or bi-component filaments are produced as endless filaments.
  • the multi-component filaments or bi-component filaments can be, for example, continuous filaments with a core-sheath configuration or continuous filaments with a side-by-side configuration.
  • the multi-component filaments or bi-component filaments can have a tendency to curl.
  • Endless filaments made from at least one thermoplastic, in particular from at least one polyolefin, preferably from polypropylene and/or polyethylene.
  • the at least one thermoplastic is a polyester or copolyester, in particular polyethylene terephthalate and/or a polyethylene terephthalate copolymer.
  • a cooling device for cooling the filaments. It is recommended that the cooling device has a cooling chamber through which the continuous filaments are guided for cooling. It is preferred that air supply cabins for supplying the cooling air are arranged on two opposite sides of the cooling chamber. According to a preferred embodiment, air supply cabins arranged one above the other are present on two opposite sides of the cooling chamber, in particular two air supply cabins arranged one above the other, from which air of different temperatures is preferably introduced into the cooling chamber. It has proven useful that a monomer suction device is provided between the spinning device and the cooling device, with which interfering gases that occur during the spinning process can be removed from the device or the spunbond device. The interfering gases can be about monomers, oligomers and similar substances.
  • a stretching device for stretching the filaments is expediently connected downstream of the cooling device in the direction of filament flow.
  • the unit consisting of the cooling device and the stretching device is designed as a closed unit in which no further air supply takes place in the closed unit apart from the supply of cooling air in the cooling device.
  • At least one diffuser is arranged between the stretching device and the sieve belt.
  • the continuous filaments emerging from the stretching device are passed through the diffuser and then deposited on the sieve belt, particularly in the deposition area of the sieve belt.
  • two diffusers connected in series are provided.
  • the depositing sieve belt or the endlessly circulating depositing sieve belt is expediently designed to be air-permeable, so that process air can be sucked off from below through the depositing sieve belt. At least in the depositing area of the depositing sieve belt, process air is expediently sucked through the depositing sieve belt by means of at least one suction device, in particular from below.
  • a preferred embodiment of the invention is characterized in that the at least one lifting roller is arranged or can be arranged in relation to the nose roller in such a way that the detachment area lies in front of the deflection area in the transport direction of the sieve belt. It is recommended that the at least one lifting roller is or can be arranged in front of or behind the nose roller in the transport direction of the sieve belt. It is within the scope of the invention that the fleece web can be guided or is guided over the upper side of the at least one lifting roller. It is recommended that the at least one lifting roller is designed as a non-suction lifting roller.
  • the distance A is smaller than the distance C between the nose roller and a deflection roller.
  • deflection roller means in particular one in addition to the nose roller for transporting the Filing sieve belt furnished roller, which is arranged in the transport direction of the filing sieve belt in front of the nose roller.
  • the deflection roller is provided in particular between the storage area and the deflection area.
  • the sieve belt can be guided along the deflection roller without being deflected from its transport direction.
  • the sieve belt is deflected from its transport direction by the deflection roller, as will be explained in more detail below.
  • the at least one nose roller is arranged in the transport direction of the sieve belt or in the conveying direction of the nonwoven web behind the depositing area and behind the unit consisting of the spinning device and the cooling device.
  • the at least one deflection roller is expediently also arranged behind the depositing area or behind the assembly of spinning device and cooling device in the transport direction of the sieve belt or in the conveying direction of the fleece web, but in front of the nose roller.
  • distance C between the nose roller and the deflection roller means in particular the distance between the axes of rotation of the nose roller and the deflection roller, which is expediently measured between the projections of the axes of rotation onto the sieve belt, with the projections of the axes of rotation perpendicular to the longitudinal extension of the sieve belt in the area of the distance C.
  • the area between the deflection roller and the nose roller is expediently a transfer table, the length of which is defined in particular by the distance C.
  • the transfer table expediently essentially has the function of transferring the nonwoven web from the depositing sieve belt to the downstream device.
  • the distance A is a maximum of 50%, preferably a maximum of 25%, preferably a maximum of 10%, particularly preferably a maximum of 5%, very particularly preferably a maximum of 2.5%, for example 1% of the distance C amounts to.
  • the distance A is at least 25% of the diameter n of the nose roller, preferably at least 50%, preferably at least 75%, particularly preferably at least 100% and very particularly preferably at least 125% of the diameter n of the nose roller.
  • the distance A is more preferably between 10% and 500%, particularly preferably between 25% and 400%, very particularly preferably between 50% and 350% of the diameter n of the nose roller.
  • the at least one lifting roller can be adjusted in height in relation to the sieve belt and, for this purpose, can preferably be moved in the vertical direction. It is recommended that the at least one lifting roller can be moved from a basic position to various lifting positions and back due to its height adjustability or vertical mobility. In the basic position of the at least one lifting roller, for example, cleaning work can be carried out on the device or the fleece web can be threaded. Then the device is not in its operating state or in its operating position. In the lifting position, the at least one lifting roller is expediently arranged relative to the nose roller in such a way that the distance A between the detachment area or the detachment line of the fleece web and the nose roller results when the device is in operation.
  • a preferred embodiment of the invention is characterized in that the at least one lifting roller is designed as a rotating lifting roller, in particular as a drivable rotating lifting roller.
  • the at least one lifting roller is designed as a simple round profile that is designed to be non-rotating and non-driven. Such a round profile has an axis of rotation instead of an axis of rotation longitudinal axis.
  • the at least one lifting roller is preferably designed as a rotating lifting roller.
  • the at least one lifting roller is or can be arranged at a distance D from the sieve belt, with this distance D expediently being greater than 50% of the diameter d of the lifting roller and preferably at least 55 %, particularly preferably at least 60%, of the diameter d of the lifting roller.
  • distance D means in particular the distance between the axis of rotation of the at least one lifting roller and the sieve belt, with this distance D expediently being measured perpendicular to the longitudinal extension of the sieve belt in the area of the at least one lifting roller or to the imaginary extension of this longitudinal extension.
  • the diameter d of the at least one lifting roller is 10 to 500 mm, preferably 25 to 400 mm, preferably 50 to 300 mm, particularly preferably 100 to 250 mm.
  • the diameter d of the at least one lifting roller is expediently smaller than 8 times the diameter n of the nose roller.
  • An embodiment that is of particular importance within the scope of the invention is characterized in that at least two, in particular two, lifting rollers are provided, with a second lifting roller preferably being or being arranged in front of the nose roller in the transport direction of the sieve belt and with a first or The first lifting roller is preferably arranged or can be arranged in the transport direction of the sieve belt between the second lifting roller and the nose roller or behind the nose roller.
  • the at least two, in particular the two, lifting rollers are designed as rotating lifting rollers.
  • the at least two, in particular the two, lifting rollers are designed as drivable, rotating lifting rollers.
  • the first lifting roller and the second lifting roller have the same diameter d or essentially the same diameter d.
  • the first and the second lifting roller may have a different diameter d 1 and d 2 .
  • the diameters d 1 and d 2 are then expediently in each case between 10 and 500 mm, preferably between 25 and 400 mm, preferably between 50 and 300 mm, particularly preferably between 100 and 250 mm.
  • the distance between the axes of rotation m of the two lifting rollers is preferably at least 105%, preferably at least 110%, particularly preferably at least 115% of the diameter d of the lifting rollers. If the two lifting rollers have a different diameter d 1 or d 2 , this information relates to the diameter of the lifting roller with the larger diameter.
  • the distance between the axes of rotation m is expediently measured between the projections of the axes of rotation of the lifting rollers onto the sieve belt, with the projections of the axes of rotation being perpendicular to the longitudinal extent of the sieve belt in the area of the lifting rollers.
  • the distance between the axes of rotation m of the two lifting rollers is less than 300%, preferably less than 250%, particularly preferably less than 200% of the diameter d of the lifting rollers. If the lift-off rollers have different diameters, this information relates to the diameter of the lift-off roller with the larger diameter.
  • the two lifting rollers are or can be arranged at a distance D or D 1 and D 2 from the sieve belt and this distance D 1 and / or D 2 is preferably greater than 50% of the respective diameter d 1 or d 2 of the lifting roller is particularly preferably at least 55% and very particularly preferably at least 60% of the respective diameter d 1 or d 2 of the lifting roller.
  • the at least two, in particular the two, lifting rollers are arranged at the same distance D or essentially at the same distance D in relation to the sieve belt. Then the distance between the respective axis of rotation of the lifting roller and the sieve belt is the same or essentially the same.
  • the lifting rollers it is also within the scope of the invention for the lifting rollers to be arranged at different distances D 1 and D 2 from the sieve belt, in which case the distance D 1 between the first lifting roller and the sieve belt is preferably greater than the distance D 2 between the second lifting roller to the discharge sieve belt.
  • the fleece web can be guided over the upper side of the at least one lifting roller. If, according to a preferred embodiment of the device according to the invention, at least two lifting rollers, in particular two lifting rollers, are provided, the fleece web can expediently be guided over the underside of the second lifting roller and over the upper side of the first lifting roller. In this context, it is preferred that the second lifting roller is arranged in front of the first lifting roller in the transport direction of the sieve belt.
  • the fleece web can be guided over the underside of the second lift-off roller and over the top of the first lift-off roller, the first lift-off roller is responsible in particular for detaching the fleece web from the sieve belt and the second lift-off roller is then recommended for holding down the fleece web near the depositing sieve belt responsible.
  • This embodiment is based on the finding that the detachment area is or can be arranged close to the second lifting roller and in particular in the area of the second lifting roller due to the second lifting roller, which holds down the fleece web.
  • the distance A from the nose roller can be further limited, so that it is in particular a maximum of 25%, preferably a maximum of 10%, preferably a maximum of 5%, particularly preferably a maximum of 2.5% of the distance C, very particularly preferably a maximum of 1%, is, for example, 0.1% of the distance C.
  • the use of two lifting rollers, with a first lifting roller being provided for the detaching process and a second lifting roller for holding down, is also based on the knowledge that the detaching area or the detaching line can be defined very reliably by the second lifting roller.
  • the distance D 2 of the second lifting roller from the depositing sieve belt has a significant influence on the distance A of the detachment area or the detachment line from the nose roller.
  • the ratio of the distance D 1 of the first lifting roller to the depositing sieve belt to the distance D 2 of the second lifting roller to the depositing sieve belt (D 1 /D 2 ) preferably influences the position of the detachment area or the detachment line in such a way that with a larger angle of wrap of the nonwoven web the second lifting roller, the detaching area or the detaching line, the closer to an intersection of a straight line running perpendicular to the sieve belt and passing through the center point of the second lifting roller, is arranged.
  • the detachment area or the detachment line is located in the area of the second detaching roller and in particular below the second detaching roller.
  • both lifting rollers are provided, it is within the scope of the invention for both lifting rollers to be adjustable in height in relation to the sieve belt and for this purpose to be preferably movable in the vertical direction. It is possible that both lifting rollers can be moved from a basic position into a lifting position or into different lifting positions and back. In the basic position, it is recommended that cleaning of the device according to the invention and/or threading of the fleece web is possible.
  • the lifting rollers are expediently arranged in their lifting positions. In principle, the device can also be operated with the lifting rollers in the basic position if it is not necessary to detach the fleece web using the lifting rollers.
  • first lifting roller is arranged in its basic position below the sieve belt and/or that the second lifting roller is arranged in its basic position above the sieve belt.
  • both lifting rollers can also be arranged above or below the depositing sieve belt in their basic position.
  • the depositing sieve belt or the transfer table is arranged parallel or substantially parallel to the device base or to the ground when the device is in operation.
  • the nose roller can be moved or lowered in the vertical direction. It is recommended that the nose roller can be moved in this way in the vertical direction or can be lowered, that the depositing sieve belt is oriented at least between the deflection roller and the nose roller in the transport direction towards the device base and preferably a gradient of greater than 0° to 20°, in particular from 3° to 20°, preferably from 4° to 18°, particularly preferably from 5° to 16°.
  • the sieve belt has a gradient in the direction of the device base
  • the sieve belt is expediently deflected by the deflection roller from its transport direction—which previously ran parallel to the device base.
  • the movability of the nose roller in the vertical direction means in particular a movability of the nose roller in the direction of the device base and back.
  • a further preferred embodiment of the device according to the invention is characterized in that the nose roller can be moved or telescoped in the horizontal direction.
  • horizontal direction means in particular in the direction parallel to the device base. Due to the horizontal mobility or telescoping ability of the nose roller, the nose roller can thus be moved closer to the following device, for example. Furthermore, the distance C between the nose roller and the deflection roller is expediently increased when moving or telescoping and reduced when the nose roller is moved back. According to a particularly preferred embodiment, the nose roller can be moved or telescoped in the horizontal direction and moved or lowered in the vertical direction. This embodiment is based on the finding that the most varied positions of the nose roller can be set.
  • a deposit sieve belt oriented towards the device underground can be realized and at the same time the nose roller can be moved close to the following device.
  • the nose roller has already been moved or lowered in the vertical direction, it means horizontal Movability or telescoping also expediently the mobility or telescoping of the nose roller in the transport direction of the sieve belt, i.e. according to the set gradient of the sieve belt or transfer table between the deflection roller and the nose roller.
  • the nose roller can be moved or telescoped in the horizontal direction and lowered or moved in the vertical direction and the lifting roller or rollers can also be moved in the vertical direction, different positions of the nose roller can be set and the lifting rollers can be adjusted are arranged in their lifting positions in such a way that the above-described distances between the rollers and between the separation area A and the nose roller are realized. These distances and positions thus relate to the operating state of the device.
  • the distance A of the detachment area from the nose roller can (also) be adjusted by the vertical mobility and/or the horizontal mobility or telescoping ability of the nose roller.
  • the nose roller can only be moved or telescoped in the horizontal direction and cannot be moved or lowered in the vertical direction.
  • the depositing sieve belt is arranged parallel or essentially parallel to the device base or to the ground and the nose roller can be moved or telescoped in the horizontal direction.
  • the nose roller cannot be moved or lowered in the vertical direction, nor in horizontally movable or telescopic, so that there is a rigid deposit screen belt, as it were, which is arranged parallel or essentially parallel to the device base or to the ground.
  • the distance A between the detachment area or the detachment line and the nose roller is smaller than the distance E between the nose roller and the depositing area of the depositing sieve belt.
  • the distance E is measured in particular between a projection of the axis of rotation of the nib roller on the storage sieve belt and the storage area, in particular the center of the storage area, with the projection of the axis of rotation of the nib roller being perpendicular to the longitudinal extent of the storage sieve belt in the area of the distance E .
  • the distance A is at most 50%, preferably at most 25%, preferably at most 10%, particularly preferably at most 5%, very particularly preferably at most 2.5%, for example 1% of distance E.
  • the distance E expediently refers to a state of the device in which the sieve belt is arranged parallel or essentially parallel to the device base or to the ground and in particular to an embodiment in which the device has no deflection roller and/or in which the nose roller cannot be moved or lowered in the vertical direction and/or cannot be moved or telescoped in the horizontal direction.
  • the downstream device is a consolidation device, in particular a hot-air bonder, for example an oven, and/or a calender and/or that the downstream device is a winder.
  • the device has at least two follow-up devices, for example a solidification device, in particular a calender and a winder.
  • the bonding device or the calender is then expediently arranged first in the conveying direction of the nonwoven web and the winder is provided behind the bonding device or the calender.
  • the bonding device or calender is used in particular for bonding or final bonding of the fleece web. After the detachment process, the fleece web is expediently transferred to the bonding device or the calender in the detachment area.
  • the consolidation device or the calender has at least one calender roll, in particular at least one pair of calender rolls, with at least one calender roll preferably being movable in the vertical direction.
  • the fleece web is guided in particular through the gap or nip between the at least two calender rolls—preferably arranged one above the other—of the at least one pair of calender rolls.
  • the nonwoven web can either be guided in such a way that it does not touch any of the calender rolls, since the calender or the at least one pair of calender rolls is open, or it can be guided in such a way that it only touches one of the calender rolls, in order to achieve the properties of the corresponding side of the nonwoven web influence or be guided in such a way that it touches both calender rolls, since the calender or the at least one pair of calender rolls is closed. It is also within the scope of the invention that the non-woven web is solidified as it is passed between the two calender rolls, in particular by thermobonding.
  • At least three calender rolls are particularly preferably provided for the bonding device or for the calender, with at least one calender roll preferably being movable in the vertical direction and with the at least three calender rolls particularly preferably being arranged one above the other.
  • This arrangement results in each case two pairs of calender rolls from the top calender roll and the middle calender roll and from the bottom calender roll and the middle calender roll.
  • the fleece web is expediently guided through one of the resulting gaps.
  • the position of the nose roller and/or the lifting rollers can be adjusted or is adjusted depending on the operating mode of the calender.
  • the bonding device or the calender is recommended to have at least one bonding area in which the fleece web is bonded or finally bonded.
  • bonding area means the area in which the fleece web is bonded or finally bonded or otherwise treated by interaction or contact with at least one calender roll. It is recommended that the consolidation area of the consolidation device or the calender is arranged above the nose roller and/or above the depositing sieve belt. The arrangement of the hardening area relates to the operating position or the operating state of the device.
  • the calender is a consolidation calender and/or a coating calender and/or a calibrating calender and/or a laminating calender and/or an activation calender.
  • the device expediently has a pre-consolidation device, which is preferably arranged in the transport direction of the sieve belt in front of the detachment area. It is possible that the detachment of the non-woven web from the depositing sieve belt before final consolidation of the non-woven web he follows. In principle, however, it is also possible for the device to be set up in such a way that the final consolidation of the non-woven web takes place before the non-woven web is detached from the sieve belt.
  • Such an embodiment in which the final consolidation of the fleece web takes place before the fleece web is detached from the depositing sieve belt, is particularly preferred if the fleece web is immediately subjected to a coating calender and/or a calibration calender and/or a laminating calender and/or an activation calender and/or to a hot air bonder such as an oven.
  • the at least one lifting roller and/or the second lifting roller to have a distance U from the nose roller that is at least 50% of the diameter of the respective lifting roller.
  • the distance U is expediently measured between the projections of the axes of rotation of the lifting roller and the nose roller onto the sieve belt, with the projections of the axes of rotation being perpendicular to the longitudinal extension of the sieve belt or to the imaginary extension of this longitudinal extension in the area of the distance U.
  • both lifting rollers are preferably at a distance U 1 and U 2 from the nose roller, which is at least 50% of the diameter of the respective lifting roller.
  • the invention also teaches a method for transporting and treating a nonwoven web made of continuous filaments, in particular with a device as described above, wherein the nonwoven web is guided over a depositing screen belt that can be deflected out of its transport direction by a nose roller in a deflection area, the nonwoven web is transferred to a downstream follow-up device, the non-woven web being detached from the sieve belt prior to the deflection area.
  • the method according to the invention is characterized in that the nonwoven web is guided over at least one lifting roller for detachment from the sieve belt, which is arranged above the sieve belt, the nonwoven web being detached from the sieve belt by means of the at least one lifting roller in a detachment area which is at a distance A is arranged to the nose roller and the nonwoven web is then fed to the follow-up device.
  • the fleece web is subsequently wound and/or coated and/or calibrated and/or activated and/or solidified in the subsequent device or devices.
  • the invention is based on the finding that the device according to the invention enables functionally reliable and simple detachment of the nonwoven web from the depositing sieve belt and that in particular the effort required to detach the nonwoven web can be reduced compared to known measures.
  • This is achieved by detaching the fleece web by means of at least one lifting roller in a detaching area which is arranged in front of the deflection area in the transport direction of the sieve belt.
  • the detachment of the non-woven web can be carried out by the measures according to the invention in particular without damaging the non-woven web, for example by tearing out filaments, so that no unwanted filament residues remain on the sieve belt. It should also be emphasized that the measures according to the invention can be implemented relatively easily and without any significant effort or expense.
  • the detachment area or the detachment line and thus the distance A from the nose roller can be adjusted very precisely.
  • various operating states of the device can be set and in particular the distance between the nose roller and a subsequent device, for example a calender, and/or a gradient of the depositing sieve belt can be implemented, in which case the lifting roller or rollers can nevertheless be arranged relative to the depositing sieve belt in such a way that the detachment of the nonwoven web takes place or can take place in a detachment area or on a detachment line in front of the deflection area .
  • the device according to the invention and the method according to the invention can therefore be used very flexibly, with a simple and functionally reliable detachment of the fleece web from the depositing sieve belt being possible in the various operating positions, for which a relatively small amount of force is required and which can be done in particular without damaging the fleece web .
  • the figures show a device for producing nonwovens from continuous filaments, with a spinning device 1 designed as a spinnerette for spinning the filaments and a cooling device 2 for cooling the filaments being present. Furthermore, a deposit sieve belt 3 is provided, on which the filaments can be deposited in a deposit area 4 to form the fleece web 5 .
  • the device is a spunbond device, with a stretching device 17 being provided for stretching the filaments.
  • the continuous filaments can expediently be monocomponent filaments made from at least one thermoplastic material.
  • the cooling device 2 has a cooling chamber 18 through which the continuous filaments are guided for cooling.
  • two air supply cabins 19, 20 are arranged one above the other on two opposite sides of the cooling chamber 18, from which air at different temperatures is preferably introduced into the cooling chamber 18.
  • a monomer suction device 21 is provided between the spinning device 1 and the cooling device 2, with which interfering gases that occur during the spinning process can be removed from the device or the spunbond device.
  • the interfering gases can be about monomers, oligomers and similar substances.
  • the stretching device 17 for stretching the filaments is connected downstream of the cooling device 2 in the filament flow direction FS.
  • the unit consisting of the cooling device 2 and the stretching device 17 is designed as a closed unit, in which, apart from the supply of cooling air in the cooling device 2, no further air supply takes place in the closed unit.
  • a diffuser 23 is arranged between the stretching device 17 and the sieve belt 3, through which the continuous filaments are guided.
  • secondary air inlet gaps 24 for the introduction of secondary air into the diffuser 23 are provided between the stretching device 17 and the diffuser 23 .
  • the continuous filaments are deposited on the sieve belt 3 in the deposition area 4 to form the nonwoven web 5 and are then expediently transported away with the sieve belt 3 in the transport direction T of the sieve belt 3 .
  • a suction device 22 for sucking air or process air through the sieve belt 3 is provided below the sieve belt 3 .
  • the sieve belt 3 can be deflected out of its transport direction T in a deflection area 6 by at least one nose roller 7 .
  • the fleece web 5 is in the operating state of the device ( Figures 2 to 4 ) before the deflection area 6 can be detached from the deposit sieve belt 3 and then transferred to at least one downstream device 8 .
  • two subsequent devices 8, a calender 16 and a winder 26 are provided.
  • Two lifting rollers 9 , 14 are provided in the exemplary embodiment according to the figures for detaching the fleece web 5 from the sieve belt 3 .
  • the lifting rollers are recommended and in the exemplary embodiment 9, 14 are designed to be adjustable in height in relation to the sieve belt 3 and can preferably be moved in the vertical direction in the exemplary embodiment. This is particularly in the 1 to recognize.
  • the lifting rollers 9, 14 can be moved from a basic position to various lifting positions and back due to their height adjustability or vertical mobility. In a basic position of the lifting rollers 9, 14 in the 1 is shown, cleaning of the device according to the invention and/or threading of the fleece web is possible, so that the device is not yet in its operating state.
  • Two different lifting positions of the lifting rollers 9, 14 are in the figures 2 and 3 shown. These figures show the device in operation.
  • the lifting rollers 9, 14 are expediently arranged above the sieve belt 3 and the fleece web 5 can be detached from the sieve belt 3 by means of the lifting rollers 9, 14 in a detachment area 10 or at a detachment line , which is arranged at a distance A from the nose roller 7 and is arranged in front of the nose roller 7 in particular in the transport direction T.
  • Distance A between the nose roller 7 and the separation area 10 or the separation line means in particular the distance between the axis of rotation of the nose roller 7 and the separation area or the separation line 10.
  • the distance A is expediently between a projection of the axis of rotation of the nose roller 7 onto the sieve belt 3 and the detachment area 10 or the detachment line, the projection of the axis of rotation being perpendicular to the longitudinal extension of the sieve belt 3 in the area of the distance A ( Figures 2 to 4 ).
  • the first lifting roller 9 is arranged in the transport direction T of the sieve belt 3 behind the nose roller 7 in the operating state of the device ( 2 ) or arranged in front of the nose roller 7 ( 3 ).
  • the second lifting roller 14 is preferably arranged in front of the nose roller 7 in the transport direction T of the sieve belt 3 .
  • the distance A is smaller than the distance C between the nose roller 7 and a deflection roller 15.
  • the deflection roller 15 is expediently a roller that is set up in addition to the nose roller 7 for transporting the depositing sieve belt 3 and which in the transport direction T of the depositing sieve belt 3 is arranged in front of the nose roller 7 .
  • the deflection roller 15 is recommended and is provided in the exemplary embodiment between the storage area 4 and the deflection area 6 .
  • the sieve belt 3 can either be guided along the deflection roller 15 without being deflected from its transport direction ( 1 ) or deflected from its transport direction by the deflection roller 15 ( figures 2 and 3 ), as explained in more detail below.
  • the distance C between the nose roller 7 and the deflection roller 15 means in particular the distance between the axes of rotation of the nose roller 7 and the deflection roller 15, which is expediently measured between the projections of the axes of rotation onto the sieve belt 3, with the projections of the axes of rotation perpendicular to the longitudinal extension of the depositing sieve belt 3 take place in the area of the distance C. It is recommended that the distance A is at most 30%, preferably at most 20%, of the distance C. In the embodiment according to 2 distance A may be about 5% of distance C. In the embodiment according to 3 distance A may be about 15% of distance C.
  • the lifting rollers 9, 14 are designed as rotating lifting rollers.
  • the diameter d of the lifting rollers 9, 14 is preferably 25 to 400 mm, particularly preferably 100 to 250 mm.
  • the first lifting roller 9 and the second lifting roller 14 have the same diameter d or essentially the same diameter d.
  • the distance between the axes of rotation m of the two lifting rollers 9, 14 in the operating state of the device is at least 115% of the diameter d of the lifting rollers 9, 14.
  • the distance between the axes of rotation m of the two lifting rollers 9, 14 is about 130% of the diameter d of the lifting rollers 9.14.
  • the distance between the axes of rotation m means in particular the distance between the axes of rotation of the two lifting rollers 9, 14, this distance between the axes of rotation m being expediently measured between the projections of the axes of rotation of the lifting rollers 9, 14 onto the depositing sieve belt 3, with the projections of the axes of rotation being perpendicular to the longitudinal extension of the Storage screen belt 3 or to the imaginary extension of this longitudinal extension.
  • the lifting rollers 9 , 14 are arranged at a distance D in relation to the sieve belt 3 .
  • distance D means in particular the distance between the axis of rotation of the respective lifting roller 9, 14 and the sieve belt 3.
  • the distance D from the sieve belt 3 is expediently perpendicular to the longitudinal extension of the sieve belt 3 in the area of the lifting rollers 9, 14 or to the measured or determined imaginary extension of this longitudinal extension.
  • the distance D or the distances D 1 and D 2 are greater than 50% of the diameter d of the respective lifting roller 9, 14.
  • the distance D 1 of the first lifting roller 9 from the depositing sieve belt 3 is greater than the distance D 2 of the second lifting roller 14 from the depositing sieve belt 3.
  • the fleece web 5 is expediently and in the exemplary embodiment in the operating state of the device over the underside of the second lifting roller 14 and over the top of the first lifting roller 9 out. This is particularly in the Figures 2 to 4 shown.
  • the first lifting roller 9 is preferably responsible for detaching the fleece web 5 from the sieve belt 3 .
  • the second lifting roller 14 is responsible for holding down the fleece web 5 near the sieve belt 3 .
  • the detachment area 10 or the detachment line is expediently and in the exemplary embodiment close to the second detaching roller 14 and in particular below the second detaching roller 14.
  • the nose roller 7 can be moved or lowered in the vertical direction in such a way that the sieve belt 3 is oriented between the deflection roller 15 and the nose roller 7 in the transport direction T towards the device base 11 .
  • the sieve belt has a gradient of 3° to 20° in this area.
  • the deposit sieve belt 3 has a gradient of about 7 ° and in the embodiment according to 3 have a gradient of about 15°.
  • the deflection roller 15 thus deflects the depositing sieve belt 3 out of its transport direction T—which previously ran in particular parallel to the device base 11 ( figures 2 and 3 ).
  • the vertical direction means in particular the movability in the direction of the device base 11 and back.
  • the nose roller 7 can be moved or telescoped in the horizontal direction.
  • horizontal direction means in particular in the direction parallel to the device base 11 . Due to the horizontal mobility or telescoping ability of the nose roller 7 , this nose roller 7 can be moved closer to the following device 8 or the calender 16 , for example.
  • the nose roller 7 can be moved or telescoped in the horizontal direction and moved or lowered in the vertical direction, so that the most varied positions of the nose roller can be set.
  • the nose roller 7 can be moved or telescoped in the horizontal direction and can be lowered in the vertical direction and the lifting rollers 9, 14 can also be moved in the vertical direction, different positions of the nose roller 7 can be set and the lifting rollers 9, 14 can be arranged in their lifting positions in such a way that in particular the distance A of the detachment region 10 from the nose roller 7 can be realized in the operating state of the device.
  • a downstream device 8 is designed as a calender 16 .
  • a further downstream device 8 in the form of a winder 26 can be provided, with the calender 16 then being arranged first in the conveying direction of the nonwoven web 5 and then the winder 26 .
  • the calender 16 has three calender rolls 12.1, 12.2 and 12.3, which can be moved in the vertical direction.
  • the fleece web 5 is guided in particular through the gap or nip between two of the calender rolls 12.1, 12.2, 12.3.
  • the three calender rolls 12.1, 12.2, 12.3 are expedient and arranged one above the other in the exemplary embodiment.
  • the fleece web 5 is expediently and in the exemplary embodiment guided through a gap or nip resulting between the calender rolls 12.1, 12.2, 12.3.
  • a bonding area 13 of the calender 16 the fleece web 5 can then be bonded or finally bonded.
  • consolidation area 13 means the area in which the fleece web 5 can be consolidated or finally consolidated by the action of at least one calender roller 12.1, 12.2, 12.3.
  • the consolidation area 13 of the calender 16 is arranged above the nose roller 7 and above the depositing sieve belt 3 in the operating state of the device.
  • the nonwoven web 5 is detached from the depositing sieve belt 3 after the fleece web 5 has been pre-consolidated. This is particularly in the 1 to recognize.
  • first lifting roller 9 and/or the second lifting roller 14 be at a distance U from the nose roller 7 which is at least 50% of the diameter of the respective lifting roller 9, 14.
  • distance U means in particular the distance between the axis of rotation of the at least one lifting roller 9, 14 and the axis of rotation of the nose roller 7, the distance U being expediently between the projections of the axes of rotation of the lifting roller 9, 14 and the nose roller 7 onto the sieve belt 3 is measured, with the projections of the axes of rotation being perpendicular to the longitudinal extension of the sieve belt 3 or to the imaginary extension of this longitudinal extension in the area of the distance U.
  • both lifting rollers 9, 14 each have a central distance U 1 and U 2 from the nose roller 7, which is at least 50% of the diameter d of the respective lifting roller 9, 14 ( 4 ).

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
EP20208671.6A 2020-11-19 2020-11-19 Dispositif de fabrication de tissus non tissés à partir de filaments continus Active EP4001488B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP20208671.6A EP4001488B1 (fr) 2020-11-19 2020-11-19 Dispositif de fabrication de tissus non tissés à partir de filaments continus
ES20208671T ES2980459T3 (es) 2020-11-19 2020-11-19 Dispositivo para fabricar telas no tejidas a partir de filamentos continuos
PL20208671.6T PL4001488T3 (pl) 2020-11-19 2020-11-19 Urządzenie do wytwarzania włóknin z filamentów bez końca
JP2021175253A JP7772553B2 (ja) 2020-11-19 2021-10-27 連続フィラメントから成る不織布を製造するための装置
KR1020210159418A KR20220068941A (ko) 2020-11-19 2021-11-18 연속 필라멘트로부터 부직포를 제조하는 방법
US17/530,509 US11598035B2 (en) 2020-11-19 2021-11-19 Method and apparatus for making a nonwoven from continuous filaments
CN202111374384.XA CN114541044A (zh) 2020-11-19 2021-11-19 用于制造由连续长丝制成的非织造制品的设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20208671.6A EP4001488B1 (fr) 2020-11-19 2020-11-19 Dispositif de fabrication de tissus non tissés à partir de filaments continus

Publications (3)

Publication Number Publication Date
EP4001488A1 true EP4001488A1 (fr) 2022-05-25
EP4001488B1 EP4001488B1 (fr) 2024-04-24
EP4001488C0 EP4001488C0 (fr) 2024-04-24

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Application Number Title Priority Date Filing Date
EP20208671.6A Active EP4001488B1 (fr) 2020-11-19 2020-11-19 Dispositif de fabrication de tissus non tissés à partir de filaments continus

Country Status (3)

Country Link
EP (1) EP4001488B1 (fr)
ES (1) ES2980459T3 (fr)
PL (1) PL4001488T3 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5807795A (en) * 1995-08-02 1998-09-15 Kimberly-Clark Worldwide, Inc. Method for producing fibers and materials having enhanced characteristics
WO2000046434A1 (fr) * 1999-02-02 2000-08-10 Hills, Inc. Formation d'une nappe encollee au filage
US20070271749A1 (en) * 2003-10-31 2007-11-29 Frederic Noelle Machine For The Production Of Different Quality Nonwovens
EP3495543A1 (fr) * 2017-12-08 2019-06-12 Trützschler GmbH & Co. KG Installation et procédé de fabrication d'un tissu non-tissé

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5807795A (en) * 1995-08-02 1998-09-15 Kimberly-Clark Worldwide, Inc. Method for producing fibers and materials having enhanced characteristics
WO2000046434A1 (fr) * 1999-02-02 2000-08-10 Hills, Inc. Formation d'une nappe encollee au filage
US20070271749A1 (en) * 2003-10-31 2007-11-29 Frederic Noelle Machine For The Production Of Different Quality Nonwovens
EP3495543A1 (fr) * 2017-12-08 2019-06-12 Trützschler GmbH & Co. KG Installation et procédé de fabrication d'un tissu non-tissé

Also Published As

Publication number Publication date
ES2980459T3 (es) 2024-10-01
EP4001488B1 (fr) 2024-04-24
EP4001488C0 (fr) 2024-04-24
PL4001488T3 (pl) 2024-08-19

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