EP1340842A1 - Apparatus for the continued production of a spunbonded web - Google Patents

Apparatus for the continued production of a spunbonded web Download PDF

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Publication number
EP1340842A1
EP1340842A1 EP02004614A EP02004614A EP1340842A1 EP 1340842 A1 EP1340842 A1 EP 1340842A1 EP 02004614 A EP02004614 A EP 02004614A EP 02004614 A EP02004614 A EP 02004614A EP 1340842 A1 EP1340842 A1 EP 1340842A1
Authority
EP
European Patent Office
Prior art keywords
suction
suction area
area
filaments
belt
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
EP02004614A
Other languages
German (de)
French (fr)
Other versions
EP1340842B1 (en
EP1340842B2 (en
Inventor
Hans-Georg Geus
Detlef Frey
Peter Dr. Schlag
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27675664&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1340842(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Reifenhaeuser GmbH and Co KG Maschinenenfabrik filed Critical Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Priority to EP02004614A priority Critical patent/EP1340842B2/en
Priority to DE50211736T priority patent/DE50211736D1/en
Priority to AT02004614T priority patent/ATE386831T1/en
Priority to ES02004614T priority patent/ES2298302T5/en
Priority to DK02004614.0T priority patent/DK1340842T4/en
Priority to JP2003051111A priority patent/JP4294975B2/en
Priority to CZ2003-583A priority patent/CZ305996B6/en
Priority to US10/375,895 priority patent/US6932590B2/en
Priority to CNB031067190A priority patent/CN1325714C/en
Priority to KR1020030012659A priority patent/KR100910605B1/en
Publication of EP1340842A1 publication Critical patent/EP1340842A1/en
Publication of EP1340842B1 publication Critical patent/EP1340842B1/en
Publication of EP1340842B2 publication Critical patent/EP1340842B2/en
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • D04H3/03—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 at random
    • D04H3/033—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 at random reorientation immediately after yarn or filament formation
    • 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
    • D04H3/16—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 filaments produced in association with filament formation, e.g. immediately following extrusion
    • 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)

Definitions

  • the invention relates to a plant for continuous Production of a spunbonded web from aerodynamic drawn filaments made of thermoplastic material, with a spinnerette delivering the filaments, whereby below the spinnerette a continuously movable Ablegesiebband is arranged on which the filaments for Spunbond can be deposited and where on the deposit screen belt a suction device for sucking air through the Deposit screen belt is provided.
  • the spinnerette has spinneret holes from which the filaments emerge from thermoplastic can. It is within the scope of the invention that Filaments are first passed through a cooling chamber the process air for cooling the filaments from one Air supply cabin is insertable.
  • the filaments arrive also expediently in a drawing unit with a pulling duct to which a laying unit is attached connects, which preferably consists of at least one diffuser consists.
  • the laying device is under the laying unit intended for depositing the filaments to the spunbonded web, part of the storage device the above continuously movable sieve belt. On this Laying screen belt, the filaments become a spunbond stored.
  • the sieve belt is a endless belt.
  • the filaments are cut with the help of Air flowing through the sieve belt by means of the suction device is sucked, as it were sucked onto the lay-off belt and deposited there as spunbonded or spunbonded web.
  • the Discharge screen belt is therefore permeable to air and the air is sucked through the sieve belt to ensure reliable operation To ensure storage of the spunbond.
  • Direction of transport behind the deposit zone of the spunbond is usually a pressure roller or a pair of pressure rollers arranged for the spunbond.
  • the invention has a technical problem based on specifying an installation of the type mentioned at the outset, with the most even spunbond storage or an even arrangement of the filaments in the Storage can be achieved.
  • the invention teaches a system of the type mentioned at the outset, which is characterized in that at least two suction areas which are separate from one another are arranged one behind the other in the conveying direction of the depositing screen belt, that one of these suction areas is a main suction area assigned to the deposit zone and that the suction speeds can be set independently of one another in the main suction area and in at least one further suction area.
  • Storage zone means the area of the invention Deposit screen belt on which the filaments primarily are deposited or on which the main part of the filaments is filed.
  • the suction device is useful arranged below the depositing belt.
  • the Suction device has at least one suction fan.
  • Suction speeds can be set independently of each other or controllable and / or adjustable and it lies in the Framework of the invention that in the at least two suction areas different suction speeds are set.
  • the suction speed is expedient highest in the main suction area. suction speed means the speed of the sucked Air in m / s.
  • a very preferred embodiment of the invention is characterized by that three in the conveying direction of the deposit screen belt suction areas separated from one another are arranged one behind the other are that a first suction area with respect to the Direction of conveyance or transport direction in front of the main suction area is arranged and that a second suction area in the conveying direction or transport direction behind the Main suction area is arranged and that the suction speeds of all three suction areas are independently adjustable. It is therefore in the Within the scope of the invention that the suction speeds in first suction area, in the second suction area and in Main extraction area can be controlled independently and / or are adjustable.
  • the suction performance is according to the invention in the three extraction areas independently of each other adjustable or controllable and / or adjustable.
  • the suction speed in the main suction area is higher than in the first and / or in the second suction area.
  • the Suction speed is in the main suction area expediently at least three times as high, preferably at least four times the suction speed in the first and / or the second suction area.
  • the preferred embodiment is the suction speed in the main suction area at least five times as high as the suction speed in the first and / or in the second suction area.
  • the suction speed is preferably in the first suction area and / or in the second Extraction range between 1 and 6 m / s, preferably between 2 and 5 m / s.
  • the suction speed is expediently 25 to 35 m / s in the main suction area, preferably 27 up to 33 m / s. According to a very preferred embodiment the suction speed in the main suction area is 30 m / s or about 30 m / s.
  • the invention is based on the knowledge that in the first suction area that is fed with the lay-off belt Air volumes can be removed with the proviso that the flow vectors at the boundary to the main suction area aligned as it were orthogonal to the surface of the screen belt are. This ensures that in Subsequent main suction area with those to be deposited Flow off the entrained air as freely as possible can. If a part of Filaments, the first suction area is fulfilled also the purpose of a transport lock, in which the already deposited filaments functionally safe by suction of the air are held on the lay-off belt. In the to the first suction area subsequent main suction area the actual fleece deposit or fleece formation takes place.
  • a functionally reliable fleece storage is achieved that the suction speed in the main suction area is greater is as the suction speed in the first suction area and is also greater than the suction speed in the subsequent second suction area.
  • the second suction area essentially serves to secure the transport of the deposited spunbonded fabric until it solidifies.
  • At least a third of the length of the second suction area based on the conveying direction of the lay-off belt, in front of a pressure roller for the spunbonded nonwoven web arranged. It is expedient for at least half of the Length of the second suction area, based on the conveying direction of the lay-off belt, in front of the pressure roller arranged.
  • the pressure roller is conveniently part of a Andrückwalzencrus. -
  • the length of the first suction area is based on the conveying direction of the lay-off belt expediently shorter than the corresponding length of the Main suction.
  • Preferably the length of the first Extraction area based on the direction of conveyance of the Lay-off belt shorter than the length of the second Suction zone.
  • a very preferred embodiment of the Invention is of particular importance because of this characterized in that the main suction area by a first boundary wall separated from the first suction area and by a second boundary wall from the second Suction area is separate and that the first and the second boundary wall across the width of the deposit screen belt form a nozzle contour with a constriction.
  • nozzle contour means within the scope of the invention that the first boundary wall and the second boundary wall below the deposit screen belt form a suction channel that is a constriction Has.
  • Bottleneck means that the distance between the first and second boundary wall at this point a minimum Has.
  • the first and the second are expedient Boundary wall symmetrical with respect to a central plane arranged, which are perpendicular to the lay-off belt and perpendicular to the conveying direction or transport direction extends.
  • the width is the Constriction adjustable in the main suction area.
  • the distance between the first boundary wall and the second boundary wall variable Preferably is the distance between the first boundary wall and the second boundary wall variable. It is expedient in the area above the Narrowest (and below the screening belt) the distance between the first boundary wall and the second Boundary wall adjustable.
  • the system according to the invention has a spinnerette whose spinneret holes the filaments emerge. It is in the context of the invention that the filaments by a Cooling chamber are led into the process air for cooling the filaments can be inserted from an air supply cabin.
  • the air supply cabin expediently consists of at least two cabin sections arranged vertically one above the other. Is preferably from a first upper Cabin section process air with a temperature between 18 ° C and 70 ° C can be supplied and is from a second lower Cabin section process air with a temperature between 18 ° C and 35 ° C can be supplied. It is within the scope of the invention that fed from the upper cabin section Air a higher temperature than that from the has air supplied to the lower cabin section.
  • each cabin section connected for the supply of process air. It is in the Framework of the invention that the temperature of each cabin section can be regulated. It is still in the Framework of the invention that the volume flows of the air flows supplied to individual cabin sections can be.
  • the system according to the invention also has a stretching unit with a pulling channel for the filaments.
  • a stretching unit with a pulling channel for the filaments.
  • This laying unit comes in With regard to the solution of the technical invention Problem is of particular importance.
  • the Laying unit or the diffuser in several stages, preferred trained in two stages.
  • the laying unit consists of a first diffuser and a subsequent second Diffuser.
  • an ambient air inlet gap is provided.
  • An opening angle is preferably ⁇ in one lower divergent area of the first diffuser infinitely adjustable.
  • the divergent side walls of the first diffuser This adjustability the diverging sidewalls can be related to a center plane of the first diffuser symmetrical or done asymmetrically.
  • the ambient air inlet gap is provided. Because of the high exit pulse comes from the first diffuser stage it draws in secondary air from the environment through the ambient air inlet gap.
  • the Width of the ambient air inlet gap adjustable. there the ambient air inlet gap can preferably be set in this way that the volume flow of the suctioned Secondary air up to 30% of the incoming volume flow the process air is.
  • the second is expedient Height-adjustable diffuser, preferably stepless height adjustable. This allows the distance to Depositing device or to the deposit screen belt can be varied. - It is essential that with the laying unit according to the invention effective with the two diffusers aerodynamic decoupling between the filament formation area and the storage area can be achieved. The helps to solve the technical problem according to the invention at.
  • the invention is based on the finding that through the Training of the system according to the invention a very uniform Arrangement of the deposited filaments and a very uniform spunbond storage can be achieved.
  • the invention is based on the knowledge that with the measures according to the invention, as it were, a filing, d. H. individual filing of each filament is achieved can be, and that interfering with this Storage can be largely excluded or minimized can.
  • overlaying can be very effective Alignment of the deposited filaments with the Sieve belt running direction can be avoided. Due to the A spunbonded web or a spunbonded nonwoven web becomes evenly deposited generated by very homogeneous properties distinguished.
  • the figures show a plant for continuous production a spunbonded web made of aerodynamically stretched Filaments made of thermoplastic.
  • the System has a spinnerette 1 and one below the Spinnerette 1 arranged cooling chamber 2, in the process air is insertable for cooling the filaments.
  • To the Cooling chamber 2 connects an intermediate channel 3 and after Intermediate channel 3 is followed by a stretching unit 4 with a Pull channel 5.
  • Is below the laying unit 6 a filing device in the form of a continuous moving sieve belt 7 for depositing the filaments Nonwoven web provided.
  • Fig. 1 the cooling chamber 2 according to the invention and the Air supply cabin 8 arranged next to the cooling chamber 2 recognizable.
  • the air supply cabin 8 is in the embodiment into an upper cabin section 8a and one divided lower cabin section 8b. From the two Process air is different in cabin sections 8a, 8b Temperature of the cooling chamber 2 can be supplied from the upper cabin section 8a process air with a temperature between 18 ° C and 70 ° C and from the lower cabin section 8b Process air with a temperature between 18 ° C and 35 ° C. Preferably that from the upper cabin section 8a process air escaping a higher temperature than that emerging from the lower cabin section 8b Process air.
  • the process air is by the way emerging from the spinnerette 1 and not shown Filaments sucked in.
  • Cabin sections 8a, 8b each have a blower 9a, 9b for Process air supply connected. It's in the frame the invention that the volume flows of the supplied Process air can be regulated. According to the invention Temperature of each in the upper cabin section 8a or entering the lower cabin section 8b Process air adjustable.
  • the intermediate channel can also be seen 3 from the exit of the cooling chamber 2 to the entrance of the Pulling channel 5 of the stretching unit 4 in vertical section converges in a wedge shape, expediently on the entrance width of the lower channel 5.
  • the pull channel 5 runs to the laying unit 6 towards the top in a vertical section.
  • the laying unit 6 consists of a first diffuser 13 and a adjoining second diffuser 14. Between the first diffuser 13 and second diffuser 14 is a Ambient air inlet gap 15 is provided. Any diffuser 13, 14 has an upper converging part as well lower diverging part. Hence everyone has Diffuser 13, 14 a narrowest point between the top converging part and the lower diverging part.
  • FIG 2 shows a storage device according to the invention with lay-off belt 7 on which the filaments form the spunbond are discardable.
  • a suction device On the deposit screen belt 7, preferably under the deposit screen belt 7 is a suction device, not shown for sucking air through the sieve belt 7 intended.
  • Preferably and in the exemplary embodiment are in Direction of conveyance of the deposit screen belt three from each other separate suction areas 10, 11, 12 in a row arranged.
  • a first suction area 10 is in relation to FIG Conveying direction arranged in front of a main suction area 11 this main suction area 11 of the deposit zone of the Deposit screen belt is assigned.
  • a second suction area 12 is behind the main suction region 11 in the conveying direction arranged.
  • the suction speeds in the three Suction areas 10, 11, 12 are independent according to the invention adjustable from each other.
  • the Suction speed in the main suction area set so that it is greater than the suction speeds in the first suction area 10 and in the second suction area 12.
  • the suction speed in the main suction area is 30 m / s.
  • the suction speeds in the first suction area 10 and in the second suction area 12 may be between 2 and 5 m / s.
  • the suction power S schematically over the length of the deposit screen belt 7 been shown. The suction power is proportional to Suction speed.
  • At least one third of the length l 2 of the second suction area 12, in relation to the conveying direction of the depositing screen belt 7, is arranged in front of a pressure roller 22 or in front of a pair of pressure rollers 22, 23.
  • at least half of the length l 2 of the second suction area 12, in relation to the conveying direction of the deposit screen belt 7, is arranged in front of the pair of pressure rollers 18.
  • the length l 1 of the first suction area 10 is expediently and in the exemplary embodiment according to FIG. 2 less than the length l 2 of the second suction area 12 and preferably also less than the length l H of the main suction area 11.
  • the lengths l 1 , l 2 and l H relate to the extent of the suction areas 10, 11, 12 in the conveying direction, specifically outside the nozzle-like cross section of the main suction area 11, which will be explained below. This can be clearly seen from FIG. 2.
  • the main suction area 11 is separated from the first suction area 10 by a first boundary wall 18 and the main suction area 11 is separated from the second suction area 12 by a second boundary wall 19.
  • the first and the second boundary wall 18, 19 form a nozzle contour with a constriction 20 over the width of the deposit screen belt 7.
  • the distance A 1 between the first boundary wall 18 and the second boundary wall 19 has a minimum.
  • the boundary walls 18, 19 are arranged symmetrically with respect to a central plane M, which central plane M extends perpendicular to the depositing belt 7 and perpendicular to the conveying direction.
  • the distance A 1 between the first boundary wall 18 and the second boundary wall 19 can be set at the constriction 20.
  • the width of the constriction 20 can be set here.
  • the distance A 3 between the first boundary wall 18 and the second boundary wall 19 can also be set in the region below the constriction 20. This distance A 3 corresponds to the length l H of the main suction area 11.
  • the distance A 2 between the first boundary wall 18 and the second boundary wall 19 can also be set in the region above the constriction 20. This is the distance A 2 of the boundary walls 18, 19 on the depositing screen belt 7.
  • angles ⁇ and ⁇ which can be seen in FIG. 2 are also adjustable, and preferably infinitely adjustable.
  • the angle ⁇ is preferably adjustable in the range between 0 and 10 ° and the angle ⁇ is advantageously adjustable in the range between 10 and 20 °.
  • the laying unit 6 consists of a first diffuser 13 and a second diffuser 14 adjoining it.
  • the first diffuser 13 has a diverging region 21, the side walls 16, 17 of which can be adjusted like a flap.
  • an opening angle ⁇ of the diverging region 21 can be set.
  • This opening angle ⁇ is expediently between 0.5 and 3 ° and is preferably 1 ° or approximately 1 °.
  • the opening angle ⁇ is preferably infinitely adjustable.
  • the side walls 16, 17 can be adjusted both symmetrically and asymmetrically to the central plane M '.
  • the second diffuser 14 secondary air is drawn in through the ambient air inlet gap 15 according to the injector principle. Due to the high output impulse of the process air from the first diffuser 13, the secondary air is sucked in from the environment through this ambient air inlet gap 15.
  • the width of the ambient air inlet gap 15 is expediently and adjustable in the exemplary embodiment.
  • the opening angle ⁇ of the second diffuser 14 is preferably also infinitely adjustable.
  • the second diffuser 14 is adjustable in height. In this way, the distance a between the second diffuser 14 and the lay-off belt 7 can be adjusted.
  • the width of the ambient air inlet gap 15 can be adjusted by the height adjustability of the second diffuser 14 and / or by the pivotability of the side walls 16, 17 in the diverging area 21 of the first diffuser 13. It is within the scope of the invention that the ambient air inlet gap 15 is set in such a way that the secondary air flows in tangentially.
  • some characteristic dimensions of the laying device 6 are shown in FIG. 3.
  • the distance S 2 between the central plane M 'and a side wall 16, 17 of the first diffuser 13 is expediently 0.8 S 1 to 2.5 (S 1 corresponds to the distance between the central plane M' and the side wall at the narrowest point of the first diffuser 13).
  • the distance s 3 of the center plane M 'to the side wall at the narrowest point of the second diffuser 14 is preferably 0.5 S 2 to 2 S 2 .
  • the distance s 4 of the central plane M 'to the lower edge of the side wall of the second diffuser 14 is 1 S 2 to 10 S 2 .
  • the length L 2 has a value from 1 S 2 to 15 S 2 .
  • Various variable values are possible for the width of the ambient air inlet gap 15.
  • the unit Cooling chamber 2, intermediate channel 3, stretching unit 4 and Laying unit 6, apart from the air intake in the Cooling chamber 2 and the air inlet at the ambient air inlet gap 15 forms a closed system.

Abstract

A spun-bond web production apparatus comprises a spinneret for producing descending thermoplastic synthetic resin filaments; receiving device for receiving filaments; continuously movable collecting foraminous belt; and at least two mutually independently controllable suction zones beneath the belt for drawing air and including a primary suction zone at which a greater part of the filaments are drawn onto the belt. A spun-bond web production apparatus comprises a spinneret (1) for producing descending thermoplastic synthetic resin filaments; receiving device below the spinneret and receiving filaments for aerodynamically stretching the filaments; continuously movable collecting foraminous belt (7) displaceable longitudinally in a web-producing direction below the receiving device to produce a spun-bond web; and at least two mutually independently controllable suction zones (11) beneath the belt for drawing air through and in succession in the web-producing direction, and including a primary suction zone at which a greater part of the filaments are drawn onto the belt and at least one other suction zone.

Description

Die Erfindung betrifft eine Anlage zur kontinuierlichen Herstellung einer Spinnvliesbahn aus aerodynamisch verstreckten Filamenten aus thermoplastischem Kunststoff, mit einer die Filamente abgebenden Spinnerette, wobei unterhalb der Spinnerette ein kontinuierlich bewegbares Ablegesiebband angeordnet ist, auf dem die Filamente zum Spinnvlies ablegbar sind und wobei an dem Ablegesiebband eine Saugeinrichtung zum Ansaugen von Luft durch das Ablegesiebband vorgesehen ist.The invention relates to a plant for continuous Production of a spunbonded web from aerodynamic drawn filaments made of thermoplastic material, with a spinnerette delivering the filaments, whereby below the spinnerette a continuously movable Ablegesiebband is arranged on which the filaments for Spunbond can be deposited and where on the deposit screen belt a suction device for sucking air through the Deposit screen belt is provided.

Die Spinnerette weist Spinndüsenbohrungen auf, aus denen die Filamente aus thermoplastischem Kunststoff austreten können. Es liegt im Rahmen der Erfindung, dass die Filamente zunächst durch eine Kühlkammer geführt werden, in die Prozessluft zur Kühlung der Filamente aus einer Luftzuführkabine einführbar ist. Die Filamente gelangen weiterhin zweckmäßigerweise in eine Verstreckeinheit mit einem Unterziehkanal, an den sich eine Verlegeeinheit anschließt, die vorzugsweise aus zumindest einem Diffusor besteht. Unter der Verlegeeinheit ist die Ablegeeinrichtung für die Ablage der Filamente zur Spinnvliesbahn vorgesehen, wobei Bestandteil der Ablegeeinrichtung das oben genannte kontinuierlich bewegbare Ablegesiebband ist. Auf diesem Ablegesiebband werden die Filamente zum Spinnvlies abgelegt. Bei dem Ablegesiebband handelt es sich um ein endlos umlaufendes Band. Die Filamente werden mit Hilfe von Luft, die mittels der Saugeinrichtung durch das Siebband angesaugt wird, gleichsam auf das Ablegesiebband gesaugt und dort als Spinnvlies bzw. Spinnvliesbahn abgelegt. Das Ablegesiebband ist also für Luft durchlässig und die Luft wird durch das Ablegesiebband gesaugt, um eine funktionssichere Ablage des Spinnvlieses zu gewährleisten. In Transportrichtung hinter der Ablegezone des Spinnvlieses ist in der Regel eine Andrückwalze bzw. ein Andrückwalzenpaar für das Spinnvlies angeordnet.The spinnerette has spinneret holes from which the filaments emerge from thermoplastic can. It is within the scope of the invention that Filaments are first passed through a cooling chamber the process air for cooling the filaments from one Air supply cabin is insertable. The filaments arrive also expediently in a drawing unit with a pulling duct to which a laying unit is attached connects, which preferably consists of at least one diffuser consists. The laying device is under the laying unit intended for depositing the filaments to the spunbonded web, part of the storage device the above continuously movable sieve belt. On this Laying screen belt, the filaments become a spunbond stored. The sieve belt is a endless belt. The filaments are cut with the help of Air flowing through the sieve belt by means of the suction device is sucked, as it were sucked onto the lay-off belt and deposited there as spunbonded or spunbonded web. The Discharge screen belt is therefore permeable to air and the air is sucked through the sieve belt to ensure reliable operation To ensure storage of the spunbond. In Direction of transport behind the deposit zone of the spunbond is usually a pressure roller or a pair of pressure rollers arranged for the spunbond.

Mit der vorstehend beschriebenen aus der Praxis bekannten Anlage, von der die Erfindung ausgeht, werden Spinnvliese erzeugt, deren Eigenschaften nicht allen Anforderungen genügen. Insbesondere die Gleichmäßigkeit der Spinnvliesablage bzw. die gleichmäßige Anordnung der Filamente bei der Ablage lässt zu wünschen übrig. Die mit der bekannten Anlage hergestellten Spinnvliese zeigen oftmals Inhomogenitäten bezüglich ihrer Filamentdichte und Maschenweite. Solche Inhomogenitäten bedingen unerwünschte Unregelmäßigkeiten insbesondere im Hinblick auf die Vliesfestigkeit, die Vliesdehnung und die Durchlässigkeit des Vlieses. Die bekannte Anlage ist aus diesem Grunde verbesserungsbedürftig.With the known from practice described above The plant from which the invention is based becomes spunbonded generates whose properties do not meet all requirements suffice. In particular, the uniformity of the spunbond storage or the uniform arrangement of the filaments the filing leaves a lot to be desired. The one with the known plant produced spunbonded fabrics often show Inhomogeneities in their filament density and Mesh size. Such inhomogeneities lead to undesirable ones Irregularities especially with regard to the Fleece strength, the fleece stretch and the permeability of the fleece. The well-known plant is for this reason in need of improvement.

Dementsprechend liegt der Erfindung das technische Problem zugrunde, eine Anlage der eingangs genannten Art anzugeben, mit der eine möglichst gleichmäßige Spinnvliesablage bzw. eine möglichst gleichmäßige Anordnung der Filamente bei der Ablage erreicht werden kann.Accordingly, the invention has a technical problem based on specifying an installation of the type mentioned at the outset, with the most even spunbond storage or an even arrangement of the filaments in the Storage can be achieved.

Zur Lösung dieses technischen Problems lehrt die Erfindung eine Anlage der eingangs genannten Art, welche dadurch gekennzeichnet ist, dass in Förderrichtung des Ablegesiebbandes zumindest zwei voneinander getrennte Absaugbereiche hintereinander angeordnet sind,
dass einer dieser Absaugbereiche ein der Ablegezone zugeordneter Hauptabsaugbereich ist
und dass in dem Hauptabsaugbereich und in zumindest einem weiteren Absaugbereich die Absauggeschwindigkeiten unabhängig voneinander einstellbar sind.To solve this technical problem, the invention teaches a system of the type mentioned at the outset, which is characterized in that at least two suction areas which are separate from one another are arranged one behind the other in the conveying direction of the depositing screen belt,
that one of these suction areas is a main suction area assigned to the deposit zone
and that the suction speeds can be set independently of one another in the main suction area and in at least one further suction area.

Ablegezone meint im Rahmen der Erfindung den Bereich des Ablegesiebbandes, auf dem die Filamente vornehmlich abgelegt werden bzw. auf dem der Hauptteil der Filamente abgelegt wird. - Die Saugeinrichtung ist zweckmäßigerweise unterhalb des Ablegesiebbandes angeordnet. Die Saugeinrichtung weist zumindest ein Sauggebläse auf.Storage zone means the area of the invention Deposit screen belt on which the filaments primarily are deposited or on which the main part of the filaments is filed. - The suction device is useful arranged below the depositing belt. The Suction device has at least one suction fan.

Erfindungsgemäß sind also in den Absaugbereichen die Sauggeschwindigkeiten jeweils unabhängig voneinander einstellbar bzw. steuerbar und/oder regelbar und es liegt im Rahmen der Erfindung, dass in den zumindest zwei Absaugbereichen jeweils unterschiedliche Sauggeschwindigkeiten eingestellt sind. Zweckmäßigerweise ist die Sauggeschwindigkeit im Hauptabsaugbereich am höchsten. Sauggeschwindigkeit meint die Geschwindigkeit der angesaugten Luft in m/s.According to the invention are in the suction areas Suction speeds can be set independently of each other or controllable and / or adjustable and it lies in the Framework of the invention that in the at least two suction areas different suction speeds are set. The suction speed is expedient highest in the main suction area. suction speed means the speed of the sucked Air in m / s.

Eine sehr bevorzugte Ausführungsform der Erfindung, der ganz besondere Bedeutung zukommt, ist dadurch gekennzeichnet, dass in Förderrichtung des Ablegesiebbandes drei voneinander getrennte Absaugbereiche hintereinander angeordnet sind, dass ein erster Absaugbereich bezüglich der Förderrichtung bzw. Transportrichtung vor dem Hauptabsaugbereich angeordnet ist und dass ein zweiter Absaugbereich in Förderrichtung bzw. Transportrichtung hinter dem Hauptabsaugbereich angeordnet ist und dass die Absauggeschwindigkeiten aller drei Absaugbereiche jeweils unabhängig voneinander einstellbar sind. Es liegt somit im Rahmen der Erfindung, dass die Absauggeschwindigkeiten im ersten Absaugbereich, im zweiten Absaugbereich und im Hauptabsaugbereich unabhängig voneinander steuerbar und/oder regelbar sind. Erfindungsgemäß sind die Absaugleistungen in den drei Absaugbereichen unabhängig voneinander einstellbar bzw. steuerbar und/oder regelbar.A very preferred embodiment of the invention, the is of particular importance is characterized by that three in the conveying direction of the deposit screen belt suction areas separated from one another are arranged one behind the other are that a first suction area with respect to the Direction of conveyance or transport direction in front of the main suction area is arranged and that a second suction area in the conveying direction or transport direction behind the Main suction area is arranged and that the suction speeds of all three suction areas are independently adjustable. It is therefore in the Within the scope of the invention that the suction speeds in first suction area, in the second suction area and in Main extraction area can be controlled independently and / or are adjustable. The suction performance is according to the invention in the three extraction areas independently of each other adjustable or controllable and / or adjustable.

Es liegt im Rahmen der Erfindung, dass die Absauggeschwindigkeit in dem Hauptabsaugbereich höher ist als in dem ersten und/oder in dem zweiten Absaugbereich. Die Absauggeschwindigkeit in dem Hauptabsaugbereich ist zweckmäßigerweise mindestens dreimal so hoch, vorzugsweise mindestens viermal so hoch wie die Absauggeschwindigkeit in dem ersten und/oder dem zweiten Absaugbereich. Nach sehr bevorzugter Ausführungsform ist die Absauggeschwindigkeit in dem Hauptabsaugbereich mindestens fünfmal so hoch wie die Absauggeschwindigkeit in dem ersten und/oder in dem zweiten Absaugbereich. Vorzugsweise liegt die Absauggeschwindigkeit im ersten Absaugbereich und/oder im zweiten Absaugbereich zwischen 1 und 6 m/s, bevorzugt zwischen 2 und 5 m/s. Zweckmäßigerweise beträgt die Absauggeschwindigkeit im Hauptabsaugbereich 25 bis 35 m/s, vorzugsweise 27 bis 33 m/s. Nach einer sehr bevorzugten Ausführungsform beträgt die Absauggeschwindigkeit im Hauptabsaugbereich 30 m/s oder etwa 30 m/s.It is within the scope of the invention that the suction speed in the main suction area is higher than in the first and / or in the second suction area. The Suction speed is in the main suction area expediently at least three times as high, preferably at least four times the suction speed in the first and / or the second suction area. After a lot the preferred embodiment is the suction speed in the main suction area at least five times as high as the suction speed in the first and / or in the second suction area. The suction speed is preferably in the first suction area and / or in the second Extraction range between 1 and 6 m / s, preferably between 2 and 5 m / s. The suction speed is expediently 25 to 35 m / s in the main suction area, preferably 27 up to 33 m / s. According to a very preferred embodiment the suction speed in the main suction area is 30 m / s or about 30 m / s.

Der Erfindung liegt die Erkenntnis zugrunde, dass in dem ersten Absaugbereich die mit dem Ablegesiebband zugeführten Luftmengen mit der Maßgabe abgeführt werden können, dass die Strömungsvektoren an der Grenze zum Hauptabsaugbereich gleichsam orthogonal zur Ablegesiebbandoberfläche ausgerichtet sind. Hierdurch wird gewährleistet, dass im anschließenden Hauptabsaugbereich die mit den abzulegenden Filamenten mitgeführte Luft möglichst ungehindert abströmen kann. Wenn im ersten Absaugbereich bereits ein Teil von Filamenten abgelegt wird, erfüllt der erste Absaugbereich auch den Zweck einer Transportsicherung, in dem die bereits abgelegten Filamente durch das Absaugen der Luft funktionssicher am Ablegesiebband gehalten werden. In dem an den ersten Absaugbereich anschließenden Hauptabsaugbereich findet die eigentliche Vliesablage bzw. Vliesbildung statt. Eine funktionssichere Vliesablage wird dadurch erreicht, dass die Sauggeschwindigkeit im Hauptabsaugbereich größer ist als die Sauggeschwindigkeit im ersten Absaugbereich und auch größer ist als die Sauggeschwindigkeit im anschließenden zweiten Absaugbereich. Der zweite Absaugbereich dient im Wesentlichen der Transportsicherung des abgelegten Spinnvlieses bis zu seiner Verfestigung.The invention is based on the knowledge that in the first suction area that is fed with the lay-off belt Air volumes can be removed with the proviso that the flow vectors at the boundary to the main suction area aligned as it were orthogonal to the surface of the screen belt are. This ensures that in Subsequent main suction area with those to be deposited Flow off the entrained air as freely as possible can. If a part of Filaments, the first suction area is fulfilled also the purpose of a transport lock, in which the already deposited filaments functionally safe by suction of the air are held on the lay-off belt. In the to the first suction area subsequent main suction area the actual fleece deposit or fleece formation takes place. A functionally reliable fleece storage is achieved that the suction speed in the main suction area is greater is as the suction speed in the first suction area and is also greater than the suction speed in the subsequent second suction area. The second suction area essentially serves to secure the transport of the deposited spunbonded fabric until it solidifies.

Nach sehr bevorzugter Ausführungsform der Erfindung ist zumindest ein Drittel der Länge des zweiten Absaugbereiches, bezogen auf die Förderrichtung des Ablegesiebbandes, vor einer Andrückwalze für die Spinnvliesbahn angeordnet. Zweckmäßigerweise ist zumindest die Hälfte der Länge des zweiten Absaugbereiches, bezogen auf die Förderrichtung des Ablegesiebbandes, vor der Andrückwalze angeordnet. Durch diese erfindungsgemäße Anordnung wird eine sehr effektive Transportsicherung des abgelegten Spinnvlieses vor der Andrückwalze erzielt. Diese Ausführungsform hat sich ganz besonders bewährt. Die Andrückwalze ist im Übrigen zweckmäßigerweise Bestandteil eines Andrückwalzenpaars. - Die Länge des ersten Absaugbereiches, bezogen auf die Förderrichtung des Ablegesiebbandes ist zweckmäßigerweise kürzer als die entsprechende Länge des Hauptabsaugbereiches. Vorzugsweise ist die Länge des ersten Absaugbereiches, bezogen auf die Förderrichtung des Ablegesiebbandes kürzer als die Länge des zweiten Absaugbereiches.According to a very preferred embodiment of the invention at least a third of the length of the second suction area, based on the conveying direction of the lay-off belt, in front of a pressure roller for the spunbonded nonwoven web arranged. It is expedient for at least half of the Length of the second suction area, based on the conveying direction of the lay-off belt, in front of the pressure roller arranged. Through this arrangement according to the invention a very effective transport lock for the stored Spun fleece achieved in front of the pressure roller. This embodiment has proven itself particularly well. The pressure roller is conveniently part of a Andrückwalzenpaars. - The length of the first suction area, is based on the conveying direction of the lay-off belt expediently shorter than the corresponding length of the Main suction. Preferably the length of the first Extraction area, based on the direction of conveyance of the Lay-off belt shorter than the length of the second Suction zone.

Grundsätzlich liegt es im Rahmen der Erfindung, dass jedem Absaugbereich ein separates Sauggebläse zugeordnet sein kann. Nach einer anderen Ausführungsform der Erfindung ist für alle Absaugbereiche lediglich ein Sauggebläse vorgesehen und sind die jeweiligen Absaugbedingungen in den Absaugbereichen mit Stellelementen und/oder Drosselelementen einstellbar. Nach dieser Ausführungsform ist also ein einziges Sauggebläse sowohl für den ersten Absaugbereich als auch für den Hauptabsaugbereich und für den zweiten Absaugbereich vorgesehen und die jeweiligen Absaugbedingungen bzw. die jeweiligen Absauggeschwindigkeiten sind in jedem der drei Bereiche mit entsprechenden Stellelementen und/oder Drosselelementen einstellbar.Basically, it is within the scope of the invention that everyone Suction area a separate suction fan can be assigned can. According to another embodiment of the invention only one suction fan for all extraction areas provided and are the respective suction conditions in the Extraction areas with control elements and / or throttle elements adjustable. So according to this embodiment a single suction fan for both the first suction area as well as for the main suction area and for the second suction area provided and the respective Extraction conditions and the respective extraction speeds are with corresponding in each of the three areas Control elements and / or throttle elements adjustable.

Eine sehr bevorzugte Ausführungsform, der im Rahmen der Erfindung ganz besondere Bedeutung zukommt, ist dadurch gekennzeichnet, dass der Hauptabsaugbereich durch eine erste Begrenzungswand von dem ersten Absaugbereich getrennt ist und durch eine zweite Begrenzungswand von dem zweiten Absaugbereich getrennt ist und dass die erste und die zweite Begrenzungswand über die Breite des Ablegesiebbandes eine Düsenkontur mit einer Engstelle ausbilden. Düsenkontur meint im Rahmen der Erfindung, dass die erste Begrenzungswand und die zweite Begrenzungswand unterhalb des Ablegesiebbandes einen Absaugkanal ausbilden, der eine Engstelle hat. Engstelle meint, dass der Abstand zwischen der ersten und zweiten Begrenzungswand an dieser Stelle ein Minimum hat. Zweckmäßigerweise sind die erste und die zweite Begrenzungswand symmetrisch bezüglich einer Mittelebene angeordnet, die sich senkrecht zum Ablegesiebband und senkrecht zur Förderrichtung bzw. Transportrichtung erstreckt. Nach sehr bevorzugter Ausführungsform der Erfindung ist der Abstand zwischen der ersten Begrenzungswand und der zweiten Begrenzungswand an der Engstelle variierbar. Mit anderen Worten ist also die Weite der Engstelle im Hauptabsaugbereich einstellbar. Vorzugsweise ist im Bereich unterhalb der Engstelle der Abstand zwischen der ersten Begrenzungswand und der zweiten Begrenzungswand variierbar. Zweckmäßigerweise ist im Bereich oberhalb der Engstelle (und unterhalb des Ablegesiebbandes) der Abstand zwischen der ersten Begrenzungswand und der zweiten Begrenzungswand einstellbar. Durch die vorgenannten Einstellmöglichkeiten können die Absaugbedingungen im Hauptabsaugbereich sehr variabel eingestellt werden. Dadurch können die Ablagebedingungen für das Spinnvlies einfach und effektiv optimiert werden. A very preferred embodiment of the Invention is of particular importance because of this characterized in that the main suction area by a first boundary wall separated from the first suction area and by a second boundary wall from the second Suction area is separate and that the first and the second boundary wall across the width of the deposit screen belt form a nozzle contour with a constriction. nozzle contour means within the scope of the invention that the first boundary wall and the second boundary wall below the deposit screen belt form a suction channel that is a constriction Has. Bottleneck means that the distance between the first and second boundary wall at this point a minimum Has. The first and the second are expedient Boundary wall symmetrical with respect to a central plane arranged, which are perpendicular to the lay-off belt and perpendicular to the conveying direction or transport direction extends. According to a very preferred embodiment of the Invention is the distance between the first boundary wall and the second boundary wall at the narrow point variable. In other words, the width is the Constriction adjustable in the main suction area. Preferably is the distance between the first boundary wall and the second boundary wall variable. It is expedient in the area above the Narrowest (and below the screening belt) the distance between the first boundary wall and the second Boundary wall adjustable. Through the aforementioned The suction conditions in the Main suction area can be set very variably. As a result, the storage conditions for the spunbonded nonwoven be optimized simply and effectively.

Die erfindungsgemäße Anlage weist eine Spinnerette auf, aus deren Spinndüsenbohrungen die Filamente austreten. Es liegt im Rahmen der Erfindung, dass die Filamente durch eine Kühlkammer geführt werden, in die Prozessluft zur Kühlung der Filamente aus einer Luftzufuhrkabine einführbar ist. Zweckmäßigerweise besteht die Luftzufuhrkabine aus zumindest zwei vertikal übereinander angeordneten Kabinenabschnitten. Vorzugsweise ist aus einem ersten oberen Kabinenabschnitt Prozessluft mit einer Temperatur zwischen 18 °C und 70°C zuführbar und ist aus einem zweiten unteren Kabinenabschnitt Prozessluft mit einer Temperatur zwischen 18 °C und 35 °C zuführbar. Es liegt im Rahmen der Erfindung, dass die aus dem oberen Kabinenabschnitt zugeführte Luft eine höhere Temperatur als die aus dem unteren Kabinenabschnitt zugeführte Luft aufweist. Vorzugsweise ist an jeden Kabinenabschnitt zumindest ein Gebläse für die Zufuhr von Prozessluft angeschlossen. Es liegt im Rahmen der Erfindung, dass die Temperatur jedes Kabinenabschnittes geregelt werden kann. Es liegt weiterhin im Rahmen der Erfindung, dass die Volumenströme der den einzelnen Kabinenabschnitten zugeführten Luftströme geregelt werden können.The system according to the invention has a spinnerette whose spinneret holes the filaments emerge. It is in the context of the invention that the filaments by a Cooling chamber are led into the process air for cooling the filaments can be inserted from an air supply cabin. The air supply cabin expediently consists of at least two cabin sections arranged vertically one above the other. Is preferably from a first upper Cabin section process air with a temperature between 18 ° C and 70 ° C can be supplied and is from a second lower Cabin section process air with a temperature between 18 ° C and 35 ° C can be supplied. It is within the scope of the invention that fed from the upper cabin section Air a higher temperature than that from the has air supplied to the lower cabin section. Preferably there is at least one blower on each cabin section connected for the supply of process air. It is in the Framework of the invention that the temperature of each cabin section can be regulated. It is still in the Framework of the invention that the volume flows of the air flows supplied to individual cabin sections can be.

Die erfindungsgemäße Anlage weist weiterhin eine Verstreckeinheit mit einem Unterziehkanal für die Filamente auf. Nach sehr bevorzugter Ausführungsform der Erfindung schließt an die Verstreckeinheit eine Verlegeeinheit mit zumindest einem Diffusor an. Dieser Verlegeeinheit kommt im Hinblick auf die Lösung des erfindungsgemäßen technischen Problems besondere Bedeutung zu. Vorzugsweise ist die Verlegeeinheit bzw. der Diffusor mehrstufig, bevorzugt zweistufig ausgebildet. Nach sehr bevorzugter Ausführungsform der Erfindung besteht die Verlegeeinheit aus einem ersten Diffusor und einem daran anschließenden zweiten Diffusor. Vorzugsweise ist zwischen dem ersten und dem zweiten Diffusor ein Umgebungslufteintrittsspalt vorgesehen. In dem ersten Diffusor kommt es zu einer Reduzierung der zur Verstreckung der Filamente notwendigen hohen Luftgeschwindigkeit am Ende des Unterziehkanals der Verstreckeinheit. Daraus resultiert ein deutlicher Druckrückgewinn. Vorzugsweise ist ein Öffnungswinkel α in einem unteren divergierenden Bereich des ersten Diffusors stufenlos verstellbar. Dazu sind die divergierenden Seitenwände des ersten Diffusors verschwenkbar. Diese Verstellbarkeit der divergierenden Seitenwände kann in Bezug auf eine Mittelebene des ersten Diffusors symmetrisch oder asymmetrisch erfolgen. Am Anfang des zweiten Diffusors ist der Umgebungslufteintrittsspalt vorgesehen. Aufgrund des hohen Austrittsimpulses aus der ersten Diffusorstufe kommt es zu einem Ansaugen von Sekundärluft aus der Umgebung durch den Umgebungslufteintrittsspalt. Vorzugsweise ist die Weite des Umgebungslufteintrittsspaltes einstellbar. Dabei kann der Umgebungslufteintrittsspalt bevorzugt so eingestellt werden, dass der Volumenstrom der angesaugten Sekundärluft bis zu 30 % des eintretenden Volumenstromes der Prozessluft beträgt. Zweckmäßigerweise ist der zweite Diffusor höhenverstellbar und zwar bevorzugt stufenlos höhenverstellbar eingerichtet. Dadurch kann der Abstand zur Ablegeeinrichtung bzw. zum Ablegesiebband variiert werden. - Wesentlich ist, dass mit der erfindungsgemäßen Verlegeeinheit mit den beiden Diffusoren eine effektive aerodynamische Entkopplung zwischen dem Filamentbildungsbereich und dem Ablagebereich erzielt werden kann. Das trägt zur Lösung des erfindungsgemäßen technischen Problems bei.The system according to the invention also has a stretching unit with a pulling channel for the filaments. According to a very preferred embodiment of the invention connects a laying unit to the stretching unit at least one diffuser. This laying unit comes in With regard to the solution of the technical invention Problem is of particular importance. Preferably the Laying unit or the diffuser in several stages, preferred trained in two stages. According to a very preferred embodiment the invention, the laying unit consists of a first diffuser and a subsequent second Diffuser. Preferably between the first and the second diffuser an ambient air inlet gap is provided. One occurs in the first diffuser Reduction of the necessary to stretch the filaments high air speed at the end of the lower duct Stretching unit. This results in a significant pressure recovery. An opening angle is preferably α in one lower divergent area of the first diffuser infinitely adjustable. In addition there are the divergent side walls of the first diffuser. This adjustability the diverging sidewalls can be related to a center plane of the first diffuser symmetrical or done asymmetrically. At the beginning of the second diffuser the ambient air inlet gap is provided. Because of the high exit pulse comes from the first diffuser stage it draws in secondary air from the environment through the ambient air inlet gap. Preferably the Width of the ambient air inlet gap adjustable. there the ambient air inlet gap can preferably be set in this way that the volume flow of the suctioned Secondary air up to 30% of the incoming volume flow the process air is. The second is expedient Height-adjustable diffuser, preferably stepless height adjustable. This allows the distance to Depositing device or to the deposit screen belt can be varied. - It is essential that with the laying unit according to the invention effective with the two diffusers aerodynamic decoupling between the filament formation area and the storage area can be achieved. The helps to solve the technical problem according to the invention at.

Der Erfindung liegt die Erkenntnis zugrunde, dass durch die erfindungsgemäße Ausbildung der Anlage eine sehr gleichmäßige Anordnung der abgelegten Filamente und eine sehr gleichmäßige Spinnvliesablage erzielt werden kann. Der Erfindung liegt insbesondere die Erkenntnis zugrunde, dass mit den erfindungsgemäßen Maßnahmen gleichsam eine Ablage, d. h. eine individuelle Ablage jedes Filamentes erreicht werden kann, und dass störende Beeinflussungen dieser Ablage weitgehend ausgeschlossen bzw. minimiert werden können. Vor allem kann sehr wirksam eine Überlagerung der Ausrichtung der abgelegten Filamente mit der Siebbandlaufrichtung vermieden werden. Aufgrund der gleichmäßigen Ablage wird ein Spinnvlies bzw. eine Spinnvliesbahn erzeugt, die sich durch sehr homogene Eigenschaften auszeichnet. Störende Inhomogenitäten, die sich im Hinblick auf die Vliesfestigkeit, die Vliesdehnung oder die Vliesdurchlässigkeit nachteilhaft auswirken, werden nicht mehr beobachtet. In der Anlage sind Vliese mit optisch sehr hoher Qualität herstellbar. Insoweit zeichnet sich die erfindungsgemäße Anlage durch beachtliche Vorteile aus.The invention is based on the finding that through the Training of the system according to the invention a very uniform Arrangement of the deposited filaments and a very uniform spunbond storage can be achieved. The In particular, the invention is based on the knowledge that with the measures according to the invention, as it were, a filing, d. H. individual filing of each filament is achieved can be, and that interfering with this Storage can be largely excluded or minimized can. Above all, overlaying can be very effective Alignment of the deposited filaments with the Sieve belt running direction can be avoided. Due to the A spunbonded web or a spunbonded nonwoven web becomes evenly deposited generated by very homogeneous properties distinguished. Disruptive inhomogeneities that occur in the With regard to the nonwoven strength, the nonwoven elongation or the Fleece permeability will not have a negative impact observed more. In the system there are fleeces with a very good visual appearance high quality. To that extent, the Plant according to the invention from considerable advantages.

Nachfolgend wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Es zeigen in schematischer Darstellung:

Fig. 1
einen Vertikalschnitt durch eine erfindungsgemäße Anlage,
Fig. 2
den vergrößerten Ausschnitt A aus dem Gegenstand der Fig. 1 und
Fig. 3
den vergrößerten Ausschnitt B aus dem Gegenstand der Fig. 1.
The invention is explained in more detail below on the basis of a drawing which represents only one exemplary embodiment. In a schematic representation:
Fig. 1
a vertical section through a system according to the invention,
Fig. 2
the enlarged section A from the subject of Fig. 1 and
Fig. 3
the enlarged section B from the subject of Fig. 1st

Die Figuren zeigen eine Anlage zur kontinuierlichen Herstellung einer Spinnvliesbahn aus aerodynamisch verstreckten Filamenten aus thermoplastischem Kunststoff. Die Anlage weist eine Spinnerette 1 sowie eine unterhalb der Spinnerette 1 angeordnete Kühlkammer 2 auf, in die Prozessluft zur Kühlung der Filamente einführbar ist. An die Kühlkammer 2 schließt ein Zwischenkanal 3 an und nach dem Zwischenkanal 3 folgt eine Verstreckeinheit 4 mit einem Unterziehkanal 5. An den Unterziehkanal 5 schließt eine Verlegeeinheit 6 an. Unterhalb der Verlegeeinheit 6 ist eine Ablegeeinrichtung in Form eines kontinuierlich bewegten Ablegesiebbandes 7 zur Ablage der Filamente zur Spinnvliesbahn vorgesehen.The figures show a plant for continuous production a spunbonded web made of aerodynamically stretched Filaments made of thermoplastic. The System has a spinnerette 1 and one below the Spinnerette 1 arranged cooling chamber 2, in the process air is insertable for cooling the filaments. To the Cooling chamber 2 connects an intermediate channel 3 and after Intermediate channel 3 is followed by a stretching unit 4 with a Pull channel 5. One connects to pull channel 5 Laying unit 6. Is below the laying unit 6 a filing device in the form of a continuous moving sieve belt 7 for depositing the filaments Nonwoven web provided.

In Fig. 1 ist die erfindungsgemäße Kühlkammer 2 sowie die neben der Kühlkammer 2 angeordnete Luftzufuhrkabine 8 erkennbar. Die Luftzufuhrkabine 8 ist im Ausführungsbeispiel in einen oberen Kabinenabschnitt 8a und einen unteren Kabinenabschnitt 8b unterteilt. Aus den beiden Kabinenabschnitten 8a, 8b ist Prozessluft unterschiedlicher Temperatur der Kühlkammer 2 zuführbar, und zwar aus dem oberen Kabinenabschnitt 8a Prozessluft mit einer Temperatur zwischen 18 °C und 70 °C und aus dem unteren Kabinenabschnitt 8b Prozessluft mit einer Temperatur zwischen 18 °C und 35 °C. Bevorzugt hat die aus dem oberen Kabinenabschnitt 8a austretende Prozessluft eine höhere Temperatur als die aus dem unteren Kabinenabschnitt 8b austretende Prozessluft. Die Prozessluft wird dabei im Übrigen von den aus der Spinnerette 1 austretenden und nicht dargestellten Filamenten angesaugt. Im Ausführungsbeispiel ist an die Kabinenabschnitte 8a, 8b jeweils ein Gebläse 9a, 9b zur Zuführung von Prozessluft angeschlossen. Es liegt im Rahmen der Erfindung, dass die Volumenströme der zugeführten Prozessluft regelbar sind. Erfindungsgemäß ist auch die Temperatur der jeweils in den oberen Kabinenabschnitt 8a oder in den untern Kabinenabschnitt 8b eintretenden Prozessluft regelbar.In Fig. 1, the cooling chamber 2 according to the invention and the Air supply cabin 8 arranged next to the cooling chamber 2 recognizable. The air supply cabin 8 is in the embodiment into an upper cabin section 8a and one divided lower cabin section 8b. From the two Process air is different in cabin sections 8a, 8b Temperature of the cooling chamber 2 can be supplied from the upper cabin section 8a process air with a temperature between 18 ° C and 70 ° C and from the lower cabin section 8b Process air with a temperature between 18 ° C and 35 ° C. Preferably that from the upper cabin section 8a process air escaping a higher temperature than that emerging from the lower cabin section 8b Process air. The process air is by the way emerging from the spinnerette 1 and not shown Filaments sucked in. In the embodiment is to Cabin sections 8a, 8b each have a blower 9a, 9b for Process air supply connected. It's in the frame the invention that the volume flows of the supplied Process air can be regulated. According to the invention Temperature of each in the upper cabin section 8a or entering the lower cabin section 8b Process air adjustable.

Der Fig. 1 ist weiterhin entnehmbar, dass der Zwischenkanal 3 vom Austritt der Kühlkammer 2 zum Eintritt des Unterziehkanals 5 der Verstreckeinheit 4 im Vertikalschnitt keilförmig zusammenläuft, und zwar zweckmäßigerweise auf die Eintrittsbreite des Unterziehkanals 5. Im Ausführungsbeispiel läuft der Unterziehkanal 5 zur Verlegeeinheit 6 hin im Vertikalschnitt keilförmig zusammen. Die Verlegeeinheit 6 besteht aus einem ersten Diffusor 13 und einem daran anschließenden zweiten Diffusor 14. Zwischen dem ersten Diffusor 13 und dem zweiten Diffusor 14 ist ein Umgebungslufteintrittsspalt 15 vorgesehen. Jeder Diffusor 13, 14 weist ein oberes konvergierendes Teil sowie ein unteres divergierendes Teil auf. Folglich hat jeder Diffusor 13, 14 eine engste Stelle zwischen dem oberen konvergierenden Teil und dem unteren divergierenden Teil. 1 that the intermediate channel can also be seen 3 from the exit of the cooling chamber 2 to the entrance of the Pulling channel 5 of the stretching unit 4 in vertical section converges in a wedge shape, expediently on the entrance width of the lower channel 5. In the embodiment the pull channel 5 runs to the laying unit 6 towards the top in a vertical section. The laying unit 6 consists of a first diffuser 13 and a adjoining second diffuser 14. Between the first diffuser 13 and second diffuser 14 is a Ambient air inlet gap 15 is provided. Any diffuser 13, 14 has an upper converging part as well lower diverging part. Hence everyone has Diffuser 13, 14 a narrowest point between the top converging part and the lower diverging part.

Die Fig. 2 zeigt eine erfindungsgemäße Ablegeeinrichtung mit Ablegesiebband 7, auf dem die Filamente zum Spinnvlies ablegbar sind. An dem Ablegesiebband 7, vorzugsweise unter dem Ablegesiebband 7 ist eine nicht dargestellte Saugeinrichtung zum Ansaugen von Luft durch das Ablegesiebband 7 vorgesehen. Vorzugsweise und im Ausführungsbeispiel sind in Förderrichtung des Ablegesiebbandes drei voneinander getrennte Absaugbereiche 10, 11, 12 hintereinander angeordnet. Ein erster Absaugbereich 10 ist bezüglich der Förderrichtung vor einem Hauptabsaugbereich 11 angeordnet, wobei dieser Hauptabsaugbereich 11 der Ablegezone des Ablegesiebbandes zugeordnet ist. Ein zweiter Absaugbereich 12 ist in Förderrichtung hinter dem Hauptabsaugbereich 11 angeordnet. Die Absauggeschwindigkeiten in den drei Absaugbereichen 10, 11, 12 sind erfindungsgemäß unabhängig voneinander einstellbar. Dabei wird zweckmäßigerweise die Absauggeschwindigkeit im Hauptabsaugbereich so eingestellt, dass sie größer ist als die Absauggeschwindigkeiten in dem ersten Absaugbereich 10 und in dem zweiten Absaugbereich 12. Im Ausführungsbeispiel mag die Absauggeschwindigkeit in dem Hauptabsaugbereich 30 m/s betragen. Die Absauggeschwindigkeiten in dem ersten Absaugbereich 10 und in dem zweiten Absaugbereich 12 mögen zwischen 2 und 5 m/s liegen. Im unteren Teil der Fig. 2 ist im Übrigen die Saugleistung S über die Länge des Ablegesiebbandes 7 schematisch dargestellt worden. Die Saugleistung ist proportional zur Sauggeschwindigkeit.2 shows a storage device according to the invention with lay-off belt 7 on which the filaments form the spunbond are discardable. On the deposit screen belt 7, preferably under the deposit screen belt 7 is a suction device, not shown for sucking air through the sieve belt 7 intended. Preferably and in the exemplary embodiment are in Direction of conveyance of the deposit screen belt three from each other separate suction areas 10, 11, 12 in a row arranged. A first suction area 10 is in relation to FIG Conveying direction arranged in front of a main suction area 11 this main suction area 11 of the deposit zone of the Deposit screen belt is assigned. A second suction area 12 is behind the main suction region 11 in the conveying direction arranged. The suction speeds in the three Suction areas 10, 11, 12 are independent according to the invention adjustable from each other. In this case, the Suction speed in the main suction area set so that it is greater than the suction speeds in the first suction area 10 and in the second suction area 12. In the exemplary embodiment, the suction speed in the main suction area is 30 m / s. The suction speeds in the first suction area 10 and in the second suction area 12 may be between 2 and 5 m / s. In the lower part of Fig. 2 is the suction power S schematically over the length of the deposit screen belt 7 been shown. The suction power is proportional to Suction speed.

Vorzugsweise ist zumindest ein Drittel der Länge l2 des zweiten Absaugbereiches 12, bezogen auf die Förderrichtung des Ablegesiebbandes 7 vor einer Andrückwalze 22 bzw. vor einem Andrückwalzenpaar 22, 23 angeordnet. Zweckmäßigerweise und im Ausführungsbeispiel ist zumindest die Hälfte der Länge l2 des zweiten Absaugbereiches 12, bezogen auf die Förderrichtung des Ablegesiebbandes 7 vor dem Andrückwalzenpaar 18 angeordnet. Zweckmäßigerweise und im Ausführungsbeispiel nach Fig. 2 ist die Länge l1 des ersten Absaugbereiches 10 kleiner als die Länge l2 des zweiten Absaugbereiches 12 und vorzugsweise auch kleiner als die Länge lH des Hauptabsaugbereiches 11. Die Längen l1, l2 und lH beziehen sich auf die Erstreckung der Absaugbereiche 10, 11, 12 in Förderrichtung und zwar außerhalb des unten noch erläuterten düsenartigen Querschnitts des Hauptabsaugbereiches 11. Das geht aus Fig. 2 deutlich hervor.Preferably, at least one third of the length l 2 of the second suction area 12, in relation to the conveying direction of the depositing screen belt 7, is arranged in front of a pressure roller 22 or in front of a pair of pressure rollers 22, 23. Appropriately and in the exemplary embodiment, at least half of the length l 2 of the second suction area 12, in relation to the conveying direction of the deposit screen belt 7, is arranged in front of the pair of pressure rollers 18. The length l 1 of the first suction area 10 is expediently and in the exemplary embodiment according to FIG. 2 less than the length l 2 of the second suction area 12 and preferably also less than the length l H of the main suction area 11. The lengths l 1 , l 2 and l H relate to the extent of the suction areas 10, 11, 12 in the conveying direction, specifically outside the nozzle-like cross section of the main suction area 11, which will be explained below. This can be clearly seen from FIG. 2.

Im Ausführungsbeispiel ist der Hauptabsaugbereich 11 durch eine erste Begrenzungswand 18 von dem ersten Absaugbereich 10 getrennt und der Hauptabsaugbereich 11 ist durch eine zweite Begrenzungswand 19 von dem zweiten Absaugbereich 12 getrennt. Die erste und die zweite Begrenzungswand 18, 19 bilden über die Breite des Ablegesiebbandes 7 eine Düsenkontur mit einer Engstelle 20 aus. An der Engstelle 20 hat der Abstand A1 zwischen der ersten Begrenzungswand 18 und der zweiten Begrenzungswand 19 ein Minimum. Vorzugsweise und im Ausführungsbeispiel sind die Begrenzungswände 18, 19 symmetrisch bezüglich einer Mittelebene M angeordnet, welche Mittelebene M sich senkrecht zum Ablegesiebband 7 und senkrecht zur Förderrichtung erstreckt.In the exemplary embodiment, the main suction area 11 is separated from the first suction area 10 by a first boundary wall 18 and the main suction area 11 is separated from the second suction area 12 by a second boundary wall 19. The first and the second boundary wall 18, 19 form a nozzle contour with a constriction 20 over the width of the deposit screen belt 7. At the constriction 20, the distance A 1 between the first boundary wall 18 and the second boundary wall 19 has a minimum. Preferably and in the exemplary embodiment, the boundary walls 18, 19 are arranged symmetrically with respect to a central plane M, which central plane M extends perpendicular to the depositing belt 7 and perpendicular to the conveying direction.

Nach sehr bevorzugter Ausführungsform ist der Abstand A1 zwischen der ersten Begrenzungswand 18 und der zweiten Begrenzungswand 19 an der Engstelle 20 einstellbar. Mit anderen Worten ist hier die Weite der Engstelle 20 einstellbar. Vorzugsweise und im Ausführungsbeispiel ist auch im Bereich unterhalb der Engstelle 20 der Abstand A3 zwischen der ersten Begrenzungswand 18 und der zweiten Begrenzungswand 19 einstellbar. Dieser Abstand A3 entspricht der Länge lH des Hauptabsaugbereiches 11. Zweckmäßigerweise und im Ausführungsbeispiel ist außerdem im Bereich oberhalb der Engstelle 20 der Abstand A2 zwischen der ersten Begrenzungswand 18 und der zweiten Begrenzungswand 19 einstellbar. Hierbei handelt es sich um den Abstand A2 der Begrenzungswände 18, 19 am Ablegesiebband 7. Aufgrund der erfindungsgemäßen Einstellbarkeit der Abschnitte der Begrenzungswände 18, 19 sind auch die in Fig. 2 erkennbaren Winkel α und β verstellbar und zwar vorzugsweise stufenlos verstellbar. Der Winkel α ist bevorzugt im Bereich zwischen 0 und 10° verstellbar und der Winkel β ist zweckmäßigerweise im Bereich zwischen 10 und 20° verstellbar.According to a very preferred embodiment, the distance A 1 between the first boundary wall 18 and the second boundary wall 19 can be set at the constriction 20. In other words, the width of the constriction 20 can be set here. Preferably and in the exemplary embodiment, the distance A 3 between the first boundary wall 18 and the second boundary wall 19 can also be set in the region below the constriction 20. This distance A 3 corresponds to the length l H of the main suction area 11. Appropriately and in the exemplary embodiment, the distance A 2 between the first boundary wall 18 and the second boundary wall 19 can also be set in the region above the constriction 20. This is the distance A 2 of the boundary walls 18, 19 on the depositing screen belt 7. Due to the adjustability of the sections of the boundary walls 18, 19 according to the invention, the angles α and β which can be seen in FIG. 2 are also adjustable, and preferably infinitely adjustable. The angle α is preferably adjustable in the range between 0 and 10 ° and the angle β is advantageously adjustable in the range between 10 and 20 °.

Besondere Bedeutung kommt im Rahmen der Erfindung der Verlegeeinheit 6 zu, deren bevorzugte Ausführungsform in der Fig. 3 dargestellt ist. Wie oben bereits ausgeführt besteht die Verlegeeinheit 6 aus einem ersten Diffusor 13 und einen daran anschließenden zweiten Diffusor 14. Der erste Diffusor 13 weist einen divergierenden Bereich 21 auf, dessen Seitenwände 16, 17 klappenartig verstellbar sind. Auf diese Weise kann ein Öffnungswinkel γ des divergierenden Bereiches 21 eingestellt werden. Dieser Öffnungswinkel γ liegt zweckmäßigerweise zwischen 0,5 und 3° und beträgt vorzugsweise 1° oder etwa 1°. Der Öffnungswinkel γ ist bevorzugt stufenlos einstellbar. Die Verstellung der Seitenwände 16, 17 kann sowohl symmetrisch als auch asymmetrisch zur Mittelebene M' erfolgen. Zu Beginn des zweiten Diffusors 14 wird durch den Umgebungslufteintrittsspalt 15 Sekundärluft nach dem Injektorprinzip angesaugt. Aufgrund des hohen Austrittsimpulses der Prozessluft aus dem ersten Diffusor 13 wird die Sekundärluft aus der Umgebung über diesen Umgebungslufteintrittsspalt 15 angesaugt. Die Weite des Umgebungslufteintrittsspaltes 15 ist zweckmäßigerweise und im Ausführungsbeispiel einstellbar. Weiterhin ist auch der Öffnungswinkel δ des zweiten Diffusors 14 vorzugsweise stufenlos verstellbar. Außerdem ist der zweite Diffusor 14 höhenverstellbar eingerichtet. Auf diese Weise kann der Abstand a des zweiten Diffusors 14 zum Ablegesiebband 7 eingestellt werden. Durch die Höhenverstellbarkeit des zweiten Diffusors 14 und/oder durch die Verschwenkbarkeit der Seitenwände 16, 17 im divergierenden Bereich 21 des ersten Diffusors 13 kann die Weite des Umgebungslufteintrittsspaltes 15 eingestellt werden. Es liegt im Rahmen der Erfindung, dass der Umgebungslufteintrittsspalt 15 so eingestellt wird, dass ein tangentiales Zuströmen der Sekundärluft erfolgt. In der Fig. 3 sind im Übrigen einige charakteristische Abmessungen der Verlegeeinrichtung 6 eingezeichnet. Der Abstand S2 zwischen der Mittelebene M' und einer Seitenwand 16, 17 des ersten Diffusors 13 beträgt zweckmäßigerweise 0,8 S1 bis 2,5 (S1 entspricht dabei dem Abstand der Mittelebene M' zur Seitenwandung an der engsten Stelle des ersten Diffusors 13). Der Abstand s3 der Mittelebene M' zur Seitenwandung an der engsten Stelle des zweiten Diffusors 14 beträgt vorzugsweise 0,5 S2 bis 2 S2. Der Abstand s4 der Mittelebene M' zur unteren Kante der Seitenwandung des zweiten Diffusors 14 beträgt 1 S2 bis 10 S2. Die Länge L2 hat einen Wert von 1 S2 bis 15 S2. Für die Weite des Umgebungslufteintrittsspaltes 15 sind verschiedene variable Werte möglich.Of particular importance in the context of the invention is the laying unit 6, the preferred embodiment of which is shown in FIG. 3. As already stated above, the laying unit 6 consists of a first diffuser 13 and a second diffuser 14 adjoining it. The first diffuser 13 has a diverging region 21, the side walls 16, 17 of which can be adjusted like a flap. In this way, an opening angle γ of the diverging region 21 can be set. This opening angle γ is expediently between 0.5 and 3 ° and is preferably 1 ° or approximately 1 °. The opening angle γ is preferably infinitely adjustable. The side walls 16, 17 can be adjusted both symmetrically and asymmetrically to the central plane M '. At the beginning of the second diffuser 14, secondary air is drawn in through the ambient air inlet gap 15 according to the injector principle. Due to the high output impulse of the process air from the first diffuser 13, the secondary air is sucked in from the environment through this ambient air inlet gap 15. The width of the ambient air inlet gap 15 is expediently and adjustable in the exemplary embodiment. Furthermore, the opening angle δ of the second diffuser 14 is preferably also infinitely adjustable. In addition, the second diffuser 14 is adjustable in height. In this way, the distance a between the second diffuser 14 and the lay-off belt 7 can be adjusted. The width of the ambient air inlet gap 15 can be adjusted by the height adjustability of the second diffuser 14 and / or by the pivotability of the side walls 16, 17 in the diverging area 21 of the first diffuser 13. It is within the scope of the invention that the ambient air inlet gap 15 is set in such a way that the secondary air flows in tangentially. In addition, some characteristic dimensions of the laying device 6 are shown in FIG. 3. The distance S 2 between the central plane M 'and a side wall 16, 17 of the first diffuser 13 is expediently 0.8 S 1 to 2.5 (S 1 corresponds to the distance between the central plane M' and the side wall at the narrowest point of the first diffuser 13). The distance s 3 of the center plane M 'to the side wall at the narrowest point of the second diffuser 14 is preferably 0.5 S 2 to 2 S 2 . The distance s 4 of the central plane M 'to the lower edge of the side wall of the second diffuser 14 is 1 S 2 to 10 S 2 . The length L 2 has a value from 1 S 2 to 15 S 2 . Various variable values are possible for the width of the ambient air inlet gap 15.

Es liegt im Rahmen der Erfindung, dass das Aggregat aus Kühlkammer 2, Zwischenkanal 3, Verstreckeinheit 4 und Verlegeeinheit 6, abgesehen von der Luftansaugung in der Kühlkammer 2 und dem Lufteintritt am Umgebungslufteintrittsspalt 15 ein geschlossenes System bildet.It is within the scope of the invention that the unit Cooling chamber 2, intermediate channel 3, stretching unit 4 and Laying unit 6, apart from the air intake in the Cooling chamber 2 and the air inlet at the ambient air inlet gap 15 forms a closed system.

Claims (10)

Anlage zur kontinuierlichen Herstellung einer Spinnvliesbahn aus aerodynamisch verstreckten Filamenten aus thermoplastischem Kunststoff, mit einer die Filamente abgebenden Spinnerette (1), wobei unterhalb der Spinnerette (1) ein kontinuierlich bewegbares Ablegesiebband (7) angeordnet ist, auf dem Filamente zum Spinnvlies ablegbar sind und wobei an dem Ablegesiebband (7) eine Saugeinrichtung zum Ansaugen von Luft durch das Ablegesiebband (7) vorgesehen ist, dadurch gekennzeichnet, dass in Förderrichtung des Ablegesiebbandes (7) zumindest zwei voneinander getrennte Absaugbereiche (10, 11, 12) hintereinander angeordnet sind, dass einer dieser Absaugbereiche (10, 11, 12) ein der Ablegezone zugeordneter Hauptabsaugbereich (11) ist, und dass in dem Hauptabsaugbereich (11) und dem zumindest einen weiteren Absaugbereich (10, 12) die Absauggeschwindigkeiten unabhängig voneinander einstellbar sind.Plant for the continuous production of a spunbonded nonwoven web made of aerodynamically stretched filaments made of thermoplastic, with a spinnerette (1) which releases the filaments, a disposable sieve belt (7) being arranged below the spinnerette (1), on which the filaments for the spunbonded web can be deposited, and wherein A suction device for sucking air through the deposit screen belt (7) is provided on the deposit screen belt (7), characterized in that at least two separate suction areas (10, 11, 12) are arranged one behind the other in the conveying direction of the deposit screen belt (7), that one said suction areas (10, 11, 12) is a main suction area (11) assigned to the deposit zone, and that the suction speeds can be set independently of one another in the main suction area (11) and the at least one further suction area (10, 12). Anlage nach Anspruch 1, dadurch gekennzeichnet, dass in Förderrichtung des Ablegesiebbandes (7) drei voneinander getrennte Absaugbereiche (10, 11, 12) hintereinander angeordnet sind, dass ein erster Absaugbereich (10) bezüglich der Förderrichtung vor dem Hauptabsaugbereich (11) angeordnet ist, und dass ein zweiter Absaugbereich (12) in Förderrichtung hinter dem Hauptabsaugbereich (11) angeordnet ist, und dass die Absauggeschwindigkeiten aller drei Absaugbereiche (10, 11, 12) unabhängig voneinander einstellbar sind. System according to claim 1, characterized in that three separate suction areas (10, 11, 12) are arranged one behind the other in the conveying direction of the depositing screen belt (7), that a first suction area (10) is arranged in front of the main suction area (11) with respect to the conveying direction, and that a second suction area (12) is arranged behind the main suction area (11) in the conveying direction, and that the suction speeds of all three suction areas (10, 11, 12) can be set independently of one another. Anlage nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Absauggeschwindigkeit im Hauptabsaugbereich (11) höher ist als in den weiteren Absaugbereichen (10, 12).System according to one of claims 1 or 2, characterized in that the suction speed in the main suction area (11) is higher than in the other suction areas (10, 12). Anlage nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Absauggeschwindigkeit im ersten Absaugbereich (10) und/oder im zweiten Absaugbereich (12) zwischen 1 und 6 m/s, vorzugsweise zwischen 2 und 5 m/s liegt.System according to one of claims 1 to 3, characterized in that the suction speed in the first suction area (10) and / or in the second suction area (12) is between 1 and 6 m / s, preferably between 2 and 5 m / s. Anlage nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Absauggeschwindigkeit im Hauptabsaugbereich (11) 25 bis 35 m/s, vorzugsweise 27 bis 33 m/s beträgt.System according to one of claims 1 to 4, characterized in that the suction speed in the main suction area (11) is 25 to 35 m / s, preferably 27 to 33 m / s. Anlage nach einem der Anspräche 1 bis 5, dadurch gekennzeichnet, dass zumindest ein Drittel der Länge 12 des zweiten Absaugbereiches (12), bezogen auf die Förderrichtung des Ablegesiebbandes (7) vor einer Andrückwalze (22) für die Spinnvliesbahn angeordnet ist.Plant according to one of Claims 1 to 5, characterized in that at least one third of the length 1 2 of the second suction area (12), in relation to the conveying direction of the depositing screen belt (7), is arranged in front of a pressure roller (22) for the spunbonded nonwoven web. Anlage nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass für die Absaugbereiche (10, 11, 12) lediglich ein Sauggebläse vorgesehen ist, und dass die jeweiligen Absaugbedingungen in den Absaugbereichen (10, 11, 12) mit Stellelementen und/oder Drosselelementen einstellbar sind.System according to one of claims 1 to 6, characterized in that only one suction fan is provided for the suction areas (10, 11, 12) and that the respective suction conditions in the suction areas (10, 11, 12) with control elements and / or throttle elements are adjustable. Anlage nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Hauptabsaugbereich (11) durch eine erste Begrenzungswand (18) von dem ersten Absaugbereich (10) getrennt ist und durch eine zweite Begrenzungswand (19) von dem zweiten Absaugbereich (12) getrennt ist, und dass die erste und die zweite Begrenzungswand (18, 19) über die Breite des Ablegesiebbandes (7) eine Düsenkontur mit einer Engstelle (20) ausbilden.System according to one of claims 1 to 7, characterized in that the main suction area (11) is separated from the first suction area (10) by a first boundary wall (18) and separated from the second suction area (12) by a second boundary wall (19) and that the first and second boundary walls (18, 19) form a nozzle contour with a constriction (20) across the width of the deposit screen belt (7). Anlage nach Anspruch 8, dadurch gekennzeichnet, dass der Abstand zwischen der ersten Begrenzungswand (18) und der zweiten Begrenzungswand (19) an der Engstelle (2) einstellbar ist.System according to claim 8, characterized in that the distance between the first boundary wall (18) and the second boundary wall (19) at the narrow point (2) is adjustable. Anlage nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, dass im Bereich unterhalb der Engstelle (20) der Abstand zwischen der erste Begrenzungswand (18) und der zweiten Begrenzungswand (19) einstellbar ist.System according to one of claims 8 or 9, characterized in that the distance between the first boundary wall (18) and the second boundary wall (19) is adjustable in the area below the narrow point (20).
EP02004614A 2002-02-28 2002-02-28 Apparatus for the continued production of a spunbonded web Expired - Lifetime EP1340842B2 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP02004614A EP1340842B2 (en) 2002-02-28 2002-02-28 Apparatus for the continued production of a spunbonded web
DE50211736T DE50211736D1 (en) 2002-02-28 2002-02-28 Plant for the continuous production of a spunbonded web
AT02004614T ATE386831T1 (en) 2002-02-28 2002-02-28 SYSTEM FOR THE CONTINUOUS PRODUCTION OF A SPUNNOVED WEB
ES02004614T ES2298302T5 (en) 2002-02-28 2002-02-28 INSTALLATION FOR THE CONTINUOUS MANUFACTURE OF A SPINNING BAND.
DK02004614.0T DK1340842T4 (en) 2002-02-28 2002-02-28 Plant for continuous fabrication of a nonwoven web
CZ2003-583A CZ305996B6 (en) 2002-02-28 2003-02-27 Apparatus for continuous production of spun-bond web
JP2003051111A JP4294975B2 (en) 2002-02-28 2003-02-27 Equipment for continuous production of spinning fleece strips
US10/375,895 US6932590B2 (en) 2002-02-28 2003-02-27 Apparatus for the continuous production of spun-bond web
CNB031067190A CN1325714C (en) 2002-02-28 2003-02-27 Equipment for continuously producing adhesive non-woven fabric web
KR1020030012659A KR100910605B1 (en) 2002-02-28 2003-02-28 Arrangement for the continuous production of a spunbonded nonwoven fabric comprising aerodynamically stretched filaments made from thermoplastic plastics

Applications Claiming Priority (1)

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EP02004614A EP1340842B2 (en) 2002-02-28 2002-02-28 Apparatus for the continued production of a spunbonded web

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EP1340842A1 true EP1340842A1 (en) 2003-09-03
EP1340842B1 EP1340842B1 (en) 2008-02-20
EP1340842B2 EP1340842B2 (en) 2010-12-08

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US (1) US6932590B2 (en)
EP (1) EP1340842B2 (en)
JP (1) JP4294975B2 (en)
KR (1) KR100910605B1 (en)
CN (1) CN1325714C (en)
AT (1) ATE386831T1 (en)
CZ (1) CZ305996B6 (en)
DE (1) DE50211736D1 (en)
DK (1) DK1340842T4 (en)
ES (1) ES2298302T5 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1548167A1 (en) * 2000-12-28 2005-06-29 Nordson Corporation An apparatus and method for forming a nonwoven web
WO2008092749A1 (en) * 2007-01-31 2008-08-07 Oerlikon Textile Gmbh & Co. Kg Method and apparatus for drawing and depositing a plurality of fibers to form a non-woven
EP2584076A1 (en) 2011-10-22 2013-04-24 Oerlikon Textile GmbH & Co. KG Device and method for guiding and depositing synthetic filaments onto a non-woven fabric
DE102011119112A1 (en) 2011-11-22 2013-05-23 Oerlikon Textile Gmbh & Co. Kg Apparatus useful for guiding and depositing synthetic filaments to form a fleece, comprises discharge device, depositing belt, and many guiding devices with many air inlet slots associated with air guiding elements, to supply secondary air
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EP2584076A1 (en) 2011-10-22 2013-04-24 Oerlikon Textile GmbH & Co. KG Device and method for guiding and depositing synthetic filaments onto a non-woven fabric
US8992810B2 (en) 2011-10-22 2015-03-31 Oerlikon Textile Gmbh & Co. Kg Apparatus and method for guiding and depositing synthetic fibers to form a nonwoven web
DE102011119112A1 (en) 2011-11-22 2013-05-23 Oerlikon Textile Gmbh & Co. Kg Apparatus useful for guiding and depositing synthetic filaments to form a fleece, comprises discharge device, depositing belt, and many guiding devices with many air inlet slots associated with air guiding elements, to supply secondary air
CN104846556A (en) * 2014-02-17 2015-08-19 赖芬豪泽机械工厂有限及两合有限公司 Device for continuous production of spun-bonded nonwoven material
EP2907909A1 (en) * 2014-02-17 2015-08-19 Reifenhäuser GmbH & Co. KG Maschinenfabrik Assembly for the continuous production of a woven material
CN104846556B (en) * 2014-02-17 2019-04-12 赖芬豪泽机械工厂有限及两合有限公司 The equipment of continuous production adhesive nonwoven width material
EP3771762A1 (en) * 2019-07-30 2021-02-03 Reifenhäuser GmbH & Co. KG Maschinenfabrik Device and method for producing a fibre web

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ES2298302T5 (en) 2011-02-24
KR100910605B1 (en) 2009-08-03
DE50211736D1 (en) 2008-04-03
ATE386831T1 (en) 2008-03-15
KR20030071574A (en) 2003-09-03
DK1340842T4 (en) 2011-03-28
CZ2003583A3 (en) 2003-10-15
EP1340842B1 (en) 2008-02-20
JP4294975B2 (en) 2009-07-15
US20030161904A1 (en) 2003-08-28
CN1441105A (en) 2003-09-10
CN1325714C (en) 2007-07-11
DK1340842T3 (en) 2008-06-16
EP1340842B2 (en) 2010-12-08
ES2298302T3 (en) 2008-05-16
CZ305996B6 (en) 2016-06-15
US6932590B2 (en) 2005-08-23

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