EP1340842B1 - Apparatus for the continued production of a spunbonded web - Google Patents
Apparatus for the continued production of a spunbonded web Download PDFInfo
- Publication number
- EP1340842B1 EP1340842B1 EP02004614A EP02004614A EP1340842B1 EP 1340842 B1 EP1340842 B1 EP 1340842B1 EP 02004614 A EP02004614 A EP 02004614A EP 02004614 A EP02004614 A EP 02004614A EP 1340842 B1 EP1340842 B1 EP 1340842B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- vacuuming
- zone
- suction
- filaments
- web
- 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.)
- Expired - Lifetime
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- 238000004519 manufacturing process Methods 0.000 title claims abstract 4
- 229920001169 thermoplastic Polymers 0.000 claims abstract 3
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract 3
- 238000005192 partition Methods 0.000 claims 7
- 229920003002 synthetic resin Polymers 0.000 abstract 2
- 239000000057 synthetic resin Substances 0.000 abstract 2
- 239000003570 air Substances 0.000 description 42
- 238000000034 method Methods 0.000 description 17
- 230000008569 process Effects 0.000 description 17
- 239000012080 ambient air Substances 0.000 description 13
- 238000001816 cooling Methods 0.000 description 13
- 239000004744 fabric Substances 0.000 description 7
- 238000000151 deposition Methods 0.000 description 6
- 238000000605 extraction Methods 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 239000012815 thermoplastic material Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
Images
Classifications
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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
- D04H3/08—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
- 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
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- 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 system for the continuous production of a spunbonded web of aerodynamically stretched filaments made of thermoplastic material, with a spinnerette donating the filaments, below the spinnerette a continuously movable Ablegesiebband is arranged, on which the filaments can be stored for spunbond and wherein the Ablegesiebband a Suction device is provided for sucking air through the Ablegesiebband.
- the spinnerette has spinneret holes from which the filaments of thermoplastic material can emerge. It is within the scope of the invention that the filaments are first passed through a cooling chamber into which process air for cooling the filaments can be inserted from an air feed booth. Furthermore, the filaments pass expediently into a drawing unit with a draw-down channel, which is followed by a laying unit, which preferably consists of at least one diffuser. Under the laying unit, the depositing device for filing the filaments to the spunbonded web is provided, wherein part of the depositing device is the above-mentioned continuously movable Ablitissiebband. On this Ablitissiebband the filaments are deposited to spunbond.
- the reject screen is an endless belt.
- the filaments are sucked by means of air, which is sucked by the suction device through the wire, as it were sucked onto the Ablegesiebband and deposited there as spunbond or spunbonded web.
- the Deposition sieve is therefore permeable to air and the air is sucked through the Ablegesiebband to ensure a reliable storage of the spunbonded fabric.
- a pressure roller or a pressure roller pair for the spunbonded fabric is usually arranged
- spunbonded nonwovens are produced whose properties do not meet all requirements.
- the spunbonded nonwovens produced with the known system often exhibit inhomogeneities with respect to their filament density and mesh size. Such inhomogeneities cause undesirable irregularities, in particular with regard to the nonwoven strength, the nonwoven elongation and the permeability of the nonwoven.
- the known system is in need of improvement for this reason.
- the invention is the technical problem of specifying a system of the type mentioned above, with the most uniform spunbonded filing and the most uniform arrangement of the filaments can be achieved in the filing.
- the invention teaches a system of the type mentioned, which is characterized in that in the conveying direction of the Ablegesiebbandes at least two separate suction areas are arranged one behind the other, one of these suction areas is a main suction area assigned to the laying zone and that in the main suction area and in at least one further suction area, the suction rates are independently adjustable.
- Deposition zone means in the context of the invention, the region of Ablegesiebbandes on which the filaments are deposited primarily or on which the main part of the filaments is stored.
- the suction device is suitably arranged below the Ablegesiebbandes.
- the suction device has at least one suction fan.
- the suction velocities are each independently adjustable or controllable and / or controllable in the suction regions and it is within the scope of the invention that different suction velocities are respectively set in the at least two suction regions.
- the suction speed in the Hauptabsaug Colour is highest.
- Suction speed means the speed of the intake air in m / s.
- a very preferred embodiment of the invention which is of very particular importance, is characterized in that three separate suction regions arranged one behind the other in the conveying direction of the Ablegesiebbandes are that a first suction region with respect to the conveying direction or transport direction is arranged in front of the Feldabsaug Colour and that a second suction in the conveying direction or transport direction behind the Hauptabsaug Colour is arranged and that the suction speeds of all three suction are each independently adjustable. It is therefore within the scope of the invention that the extraction speeds in the first suction area, in the second suction area and in the main suction area are independently controllable and / or controllable. According to the invention, the suction capacities in the three suction areas are independently adjustable or controllable and / or controllable.
- the extraction speed in the Hauptabsaug Colour Index in the Mannabsaug College is higher than in the first and / or in the second suction.
- the suction rate in the Feldabsaug College is expediently at least three times as high, preferably at least four times as high as the suction speed in the first and / or the second suction.
- the suction speed in the Feldabsaug College is at least five times as high as the suction speed in the first and / or in the second suction.
- the suction speed in the first suction region and / or in the second suction region is preferably between 1 and 6 m / s, preferably between 2 and 5 m / s.
- the extraction speed in the Hauptabsaug Colour is 25 to 35 m / s, preferably 27 to 33 m / s. According to a very preferred embodiment the extraction speed in the main suction area is 30 m / s or about 30 m / s.
- the invention is based on the finding that in the first suction area, the quantities of air supplied with the discharge screen belt can be discharged with the proviso that the flow vectors are oriented at the boundary to the main suction area, as it were orthogonal to the discharge screen belt surface. This ensures that in the subsequent Hauptabsaug Colour entrained with the filaments to be deposited air can flow as freely as possible. If a portion of filaments is already deposited in the first suction area, the first suction area also fulfills the purpose of a transport lock in which the already deposited filaments are reliably held by the suction of the air on Ablegesiebband. In the main suction area adjoining the first suction area, the actual nonwoven storage or fleece formation takes place.
- a functionally reliable non-woven storage is achieved in that the suction speed in the Hauptabsaug Scheme is greater than the suction speed in the first suction and also greater than the suction speed in the subsequent second suction.
- the second suction area essentially serves to secure the transport of the deposited spunbonded fabric until it is solidified.
- the length of the first Absaug Hoches, based on the conveying direction of the Ablegesiebbandes is suitably shorter than the corresponding length of the Hauptabsaug Hoches.
- the length of the first suction region, based on the conveying direction of the Ablegesiebbandes shorter than the length of the second suction region.
- each suction area can be assigned a separate suction fan.
- only one suction fan is provided for all suction areas and the respective suction conditions in the suction areas with adjusting elements and / or throttle elements are adjustable.
- a single suction fan is provided both for the first suction area and for the main suction area and for the second suction area, and the respective suction conditions and the respective suction speeds can be set in each of the three areas with corresponding setting elements and / or throttle elements.
- a very preferred embodiment which is of very particular importance in the context of the invention, is characterized characterized in that the Hauptabsaug Scheme is separated by a first boundary wall of the first suction and separated by a second boundary wall of the second suction and that the first and the second boundary wall over the width of the reject screen forming a nozzle contour with a constriction.
- Düsenkontur means in the invention, that the first boundary wall and the second boundary wall below the Ablegesiebbandes form a suction, which has a bottleneck.
- Bottleneck means that the distance between the first and second boundary wall at this point has a minimum.
- the first and the second boundary wall are arranged symmetrically with respect to a median plane which extends perpendicular to the Ablegesiebband and perpendicular to the conveying direction or transport direction.
- the distance between the first boundary wall and the second boundary wall at the constriction is variable.
- the width of the bottleneck in the Hauptabsaug Hoch is adjustable.
- the distance between the first boundary wall and the second boundary wall can be varied.
- the distance between the first boundary wall and the second boundary wall adjustable. Due to the aforementioned adjustment possibilities, the suction conditions in the main suction area can be set very variably. As a result, the storage conditions for the spunbonded fabric can be optimized simply and effectively.
- the system according to the invention has a spinnerette from whose spinneret bores the filaments exit. It is within the scope of the invention that the filaments are passed through a cooling chamber into which process air for cooling the filaments from an air supply cabin can be inserted.
- the air supply cabin consists of at least two vertically stacked cabin sections. Preferably, process air having a temperature between 18 ° C and 70 ° C can be supplied from a first upper cabin section and process air having a temperature between 18 ° C and 35 ° C can be supplied from a second lower cabin section. It is within the scope of the invention that the air supplied from the upper cabin section has a higher temperature than the air supplied from the lower cabin section.
- At least one fan for the supply of process air is connected to each cabin section. It is within the scope of the invention that the temperature of each cabin section can be controlled. It is also within the scope of the invention that the volume flows of the individual cabin sections supplied air streams can be controlled.
- the system according to the invention also has a drawing unit with a draw-down channel for the filaments.
- a laying unit with at least one diffuser adjoins the drawing unit.
- This laying unit is of particular importance with regard to the solution of the technical problem according to the invention.
- the laying unit or the diffuser is multi-stage, preferably formed in two stages.
- the laying unit consists of a first diffuser and an adjoining second diffuser.
- an ambient air inlet gap is provided between the first and second diffusers. In the first diffuser, there is a reduction in the high air velocity necessary for drawing the filaments at the end of the draw channel of the drawing unit.
- an opening angle ⁇ in a lower diverging region of the first diffuser is infinitely adjustable.
- the diverging side walls of the first diffuser are pivotable. This adjustability of the diverging sidewalls may be symmetric or asymmetrical with respect to a median plane of the first diffuser.
- the ambient air inlet gap is provided. Due to the high exit pulse from the first diffuser stage, there is a suction of secondary air from the environment through the ambient air inlet gap.
- the width of the ambient air inlet gap is adjustable.
- the ambient air inlet gap can preferably be adjusted so that the volume flow of the sucked secondary air is up to 30% of the incoming volume flow of the process air.
- the second diffuser is adjustable in height and although preferably arranged infinitely adjustable in height. As a result, the distance to the depositing device or to the Ablegesiebband can be varied. - It is essential that with the laying unit according to the invention with the two diffusers effective aerodynamic decoupling between the filament formation area and the storage area can be achieved. This contributes to the solution of the technical problem according to the invention.
- the invention is based on the finding that a very uniform arrangement of the deposited filaments and a very uniform Spinnvliesablage can be achieved by the inventive design of the system.
- the invention is based in particular on the finding that the measures according to the invention as it were a filing, d. H. an individual filing of each filament can be achieved, and that disturbing influences on this filing can be largely excluded or minimized. Above all, a superposition of the orientation of the deposited filaments can be very effectively avoided with the Siebbandlaufraum. Due to the uniform storage a spunbond or a spunbonded web is produced, which is characterized by very homogeneous properties.
- the figures show a plant for the continuous production of a spunbonded web of aerodynamically stretched filaments of thermoplastic material.
- the system has a spinnerette 1 and a cooling chamber 2 arranged below the spinnerette 1, into which process air for cooling the filaments can be inserted.
- To the cooling chamber 2 includes an intermediate channel 3 and after the intermediate channel 3 is followed by a drawing unit 4 with a Unterziehkanal 5.
- At the Unterziehkanal 5 includes a laying unit 6 at. Below the laying unit 6, a laying device in the form of a continuously moving Ablitissiebbandes 7 is provided for storing the filaments to the spunbonded web.
- Fig. 1 the cooling chamber 2 according to the invention and the air supply cabin 8 arranged next to the cooling chamber 2 can be seen.
- the air supply cabin 8 is divided in the exemplary embodiment into an upper cabin section 8a and a lower cabin section 8b. From the two cabin sections 8a, 8b process air of different temperature of the cooling chamber 2 can be fed, namely 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 at a temperature between 18 ° C. and 35 ° C.
- the process air exiting from the upper cabin section 8a preferably has a higher temperature than the process air exiting from the lower cabin section 8b.
- the process air is sucked in by the filaments emerging from the spinnerette 1 and not shown.
- a fan 9a, 9b for supplying process air is connected to the cabin sections 8a, 8b in each case. It is within the scope of the invention that the volume flows of the supplied process air can be regulated. According to the invention, the temperature of the process air entering the upper cabin section 8a or the lower cabin section 8b can also be regulated.
- the intermediate channel 3 from the outlet of the cooling chamber 2 to the inlet of the drawstring 5 of the drawing unit 4 in a vertical section converges wedge-shaped, and expediently to the inlet width of the Unterziehkanals 5.
- the laying unit 6 consists of a first diffuser 13 and a second diffuser 14 adjoining thereto.
- An ambient air inlet gap 15 is provided between the first diffuser 13 and the second diffuser 14.
- Each diffuser 13, 14 has an upper converging part and a lower diverging part. Consequently, each diffuser 13, 14 has a narrowest point between the upper converging part and the lower diverging part.
- the Fig. 2 shows a depositing device according to the invention with Ablegesiebband 7, on which the filaments are deposited to the spunbonded fabric.
- a suction device for sucking air through the Ablegesiebband 7 is provided.
- three separate suction regions 10, 11, 12 are arranged one behind the other in the conveying direction of the Ablegesiebbandes.
- a first suction region 10 is arranged in front of a main suction region 11 with respect to the conveying direction, this main suction region 11 being associated with the laying zone of the laying sieve belt.
- a second suction region 12 is arranged downstream of the main suction region 11 in the conveying direction.
- the extraction speeds in the three suction regions 10, 11, 12 are independently adjustable according to the invention.
- the suction speed in the main suction area is expediently 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 may be 30 m / s.
- the extraction speeds in the first suction region 10 and in the second suction region 12 may be between 2 and 5 m / s.
- the suction power S has been shown schematically over the length of the Ablegesiebbandes 7.
- the suction power is proportional to the suction speed.
- at least half of the length l 2 of the second suction region 12, based on the conveying direction of the Ablegesiebbandes 7 in front of the pressure roller pair 18 is arranged.
- the length l 1 of the first suction region 10 is smaller than the length l 2 of the second suction region 12 and preferably also smaller than the length l H of the Hauptabsaug Kunststoffes 11.
- the lengths l 1 , l 2 and l H refer to the extension of the suction 10th , 11, 12 in the conveying direction and that outside of the below-mentioned nozzle-like cross section of the Hauptabsaug Coloures 11. That goes out Fig. 2 clearly visible.
- the main suction region 11 is separated from the first suction region 10 by a first boundary wall 18, and the main suction region 11 is separated from the second suction region 12 by a second boundary wall 19.
- the first and the second boundary wall 18, 19 form over the width of the Ablegesiebbandes 7 a nozzle contour with a constriction 20.
- 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 median plane M, which median plane M extends perpendicular to the Ablegesiebband 7 and perpendicular to the conveying direction.
- the distance A 1 between the first boundary wall 18 and the second boundary wall 19 at the constriction 20 is adjustable.
- the width of the constriction 20 is adjustable here.
- the distance A 3 between the first boundary wall 18 and the second boundary wall 19 can also be adjusted in the region below the constriction 20.
- This distance A 3 corresponds to the length l H of Hauptabsaug Hoches 11.
- the distance A 2 between the first boundary wall 18 and the second boundary wall 19 adjustable.
- the sections of the boundary walls 18, 19 are also in Fig. 2 recognizable angle ⁇ and ⁇ adjustable and preferably continuously adjustable.
- the angle ⁇ is preferably adjustable in the range between 0 and 10 ° and the angle ⁇ is expediently adjustable in the range between 10 and 20 °.
- the laying unit 6 whose preferred embodiment in the Fig. 3 is shown.
- the laying unit 6 consists of a first diffuser 13 and a second diffuser 14 adjoining thereto.
- the first diffuser 13 has a diverging region 21, the side walls 16, 17 of which are adjustable in the manner of a flap.
- an opening angle ⁇ of the diverging region 21 can be adjusted.
- This opening angle ⁇ is suitably between 0.5 and 3 ° and is preferably 1 ° or about 1 °.
- the opening angle ⁇ is preferably infinitely adjustable.
- the Adjustment of the side walls 16, 17 can be done both symmetrically and asymmetrically to the center plane M '.
- the second diffuser 14 secondary air is sucked in according to the injector principle by the ambient air inlet gap 15. Due to the high exit pulse of the process air from the first diffuser 13, the secondary air is sucked in from the environment via this ambient air inlet gap 15.
- the width of the ambient air inlet gap 15 is expediently and in the embodiment adjustable.
- the opening angle ⁇ of the second diffuser 14 is preferably infinitely adjustable.
- the second diffuser 14 is adjustable in height. In this way, the distance a of the second diffuser 14 to the Ablegesiebband 7 can be adjusted.
- the width of the ambient air inlet gap 15 can be adjusted. It is within the scope of the invention that the ambient air inlet gap 15 is set so that a tangential inflow of the secondary air takes place.
- the distance s 2 between the center 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 of the median plane M' to the side wall at the narrowest point of the first diffuser 13).
- the distance s 3 of the median 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 median plane M 'to the lower edge of Side wall of the second diffuser 14 is 1 s 2 to 10 s 2 .
- the length L 2 has a value of 1 s 2 to 15 s 2 . For the width of the ambient air inlet gap 15 different variable values are possible.
- the aggregate of cooling chamber 2, intermediate channel 3, drawing 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.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
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 system for the continuous production of a spunbonded web of aerodynamically stretched filaments made of thermoplastic material, with a spinnerette donating the filaments, below the spinnerette a continuously movable Ablegesiebband is arranged, on which the filaments can be stored for spunbond and wherein the Ablegesiebband a Suction device is provided for sucking air through the Ablegesiebband.
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 angeordnetThe spinnerette has spinneret holes from which the filaments of thermoplastic material can emerge. It is within the scope of the invention that the filaments are first passed through a cooling chamber into which process air for cooling the filaments can be inserted from an air feed booth. Furthermore, the filaments pass expediently into a drawing unit with a draw-down channel, which is followed by a laying unit, which preferably consists of at least one diffuser. Under the laying unit, the depositing device for filing the filaments to the spunbonded web is provided, wherein part of the depositing device is the above-mentioned continuously movable Ablegesiebband. On this Ablegesiebband the filaments are deposited to spunbond. The reject screen is an endless belt. The filaments are sucked by means of air, which is sucked by the suction device through the wire, as it were sucked onto the Ablegesiebband and deposited there as spunbond or spunbonded web. The Deposition sieve is therefore permeable to air and the air is sucked through the Ablegesiebband to ensure a reliable storage of the spunbonded fabric. In the transport direction behind the laying zone of the spunbonded fabric, a pressure roller or a pressure roller pair for the spunbonded fabric is usually arranged
Eine derartige Anlage ist etwa in
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 is the technical problem of specifying a system of the type mentioned above, with the most uniform spunbonded filing and the most uniform arrangement of the filaments can be achieved in the filing.
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, which is characterized in that in the conveying direction of the Ablegesiebbandes at least two separate suction areas are arranged one behind the other,
one of these suction areas is a main suction area assigned to the laying zone
and that in the main suction area and in at least one further suction area, the suction rates are independently adjustable.
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.Deposition zone means in the context of the invention, the region of Ablegesiebbandes on which the filaments are deposited primarily or on which the main part of the filaments is stored. - The suction device is suitably arranged below the Ablegesiebbandes. 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, therefore, the suction velocities are each independently adjustable or controllable and / or controllable in the suction regions and it is within the scope of the invention that different suction velocities are respectively set in the at least two suction regions. Conveniently, the suction speed in the Hauptabsaugbereich is highest. Suction speed means the speed of the intake 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, which is of very particular importance, is characterized in that three separate suction regions arranged one behind the other in the conveying direction of the Ablegesiebbandes are that a first suction region with respect to the conveying direction or transport direction is arranged in front of the Hauptabsaugbereich and that a second suction in the conveying direction or transport direction behind the Hauptabsaugbereich is arranged and that the suction speeds of all three suction are each independently adjustable. It is therefore within the scope of the invention that the extraction speeds in the first suction area, in the second suction area and in the main suction area are independently controllable and / or controllable. According to the invention, the suction capacities in the three suction areas are independently adjustable or controllable and / or controllable.
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 extraction speed in the Hauptabsaugbereich is higher than in the first and / or in the second suction. The suction rate in the Hauptabsaugbereich is expediently at least three times as high, preferably at least four times as high as the suction speed in the first and / or the second suction. According to a very preferred embodiment, the suction speed in the Hauptabsaugbereich is at least five times as high as the suction speed in the first and / or in the second suction. The suction speed in the first suction region and / or in the second suction region is preferably between 1 and 6 m / s, preferably between 2 and 5 m / s. Conveniently, the extraction speed in the Hauptabsaugbereich is 25 to 35 m / s, preferably 27 to 33 m / s. According to a very preferred embodiment the extraction 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 finding that in the first suction area, the quantities of air supplied with the discharge screen belt can be discharged with the proviso that the flow vectors are oriented at the boundary to the main suction area, as it were orthogonal to the discharge screen belt surface. This ensures that in the subsequent Hauptabsaugbereich entrained with the filaments to be deposited air can flow as freely as possible. If a portion of filaments is already deposited in the first suction area, the first suction area also fulfills the purpose of a transport lock in which the already deposited filaments are reliably held by the suction of the air on Ablegesiebband. In the main suction area adjoining the first suction area, the actual nonwoven storage or fleece formation takes place. A functionally reliable non-woven storage is achieved in that the suction speed in the Hauptabsaugbereich is greater than the suction speed in the first suction and also greater than the suction speed in the subsequent second suction. The second suction area essentially serves to secure the transport of the deposited spunbonded fabric until it is solidified.
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 one third of the length of the second suction region, relative to the conveying direction of the Ablegesiebbandes, arranged in front of a pressure roller for the spunbonded web. Conveniently, at least half of Length of the second suction, with respect to the conveying direction of the Ablegesiebbandes, arranged in front of the pressure roller. By this arrangement according to the invention a very effective transport safety of the deposited spunbonded fabric is achieved in front of the pressure roller. This embodiment has proven particularly useful. Incidentally, the pressure roller is expediently part of a pressure roller pair. - The length of the first Absaugbereiches, based on the conveying direction of the Ablegesiebbandes is suitably shorter than the corresponding length of the Hauptabsaugbereiches. Preferably, the length of the first suction region, based on the conveying direction of the Ablegesiebbandes shorter than the length of the second suction region.
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.In principle, it is within the scope of the invention that each suction area can be assigned a separate suction fan. According to another embodiment of the invention, only one suction fan is provided for all suction areas and the respective suction conditions in the suction areas with adjusting elements and / or throttle elements are adjustable. Thus, according to this embodiment, a single suction fan is provided both for the first suction area and for the main suction area and for the second suction area, and the respective suction conditions and the respective suction speeds can be set in each of the three areas with corresponding setting elements and / or throttle elements.
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, which is of very particular importance in the context of the invention, is characterized characterized in that the Hauptabsaugbereich is separated by a first boundary wall of the first suction and separated by a second boundary wall of the second suction and that the first and the second boundary wall over the width of the reject screen forming a nozzle contour with a constriction. Düsenkontur means in the invention, that the first boundary wall and the second boundary wall below the Ablegesiebbandes form a suction, which has a bottleneck. Bottleneck means that the distance between the first and second boundary wall at this point has a minimum. Conveniently, the first and the second boundary wall are arranged symmetrically with respect to a median plane which extends perpendicular to the Ablegesiebband and perpendicular to the conveying direction or transport direction. According to a very preferred embodiment of the invention, the distance between the first boundary wall and the second boundary wall at the constriction is variable. In other words, the width of the bottleneck in the Hauptabsaugbereich is adjustable. Preferably, in the region below the constriction, the distance between the first boundary wall and the second boundary wall can be varied. Conveniently, in the area above the constriction (and below the Ablegesiebbandes), the distance between the first boundary wall and the second boundary wall adjustable. Due to the aforementioned adjustment possibilities, the suction conditions in the main suction area can be set very variably. As a result, the storage conditions for the spunbonded fabric can 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 from whose spinneret bores the filaments exit. It is within the scope of the invention that the filaments are passed through a cooling chamber into which process air for cooling the filaments from an air supply cabin can be inserted. Conveniently, the air supply cabin consists of at least two vertically stacked cabin sections. Preferably, process air having a temperature between 18 ° C and 70 ° C can be supplied from a first upper cabin section and process air having a temperature between 18 ° C and 35 ° C can be supplied from a second lower cabin section. It is within the scope of the invention that the air supplied from the upper cabin section has a higher temperature than the air supplied from the lower cabin section. Preferably, at least one fan for the supply of process air is connected to each cabin section. It is within the scope of the invention that the temperature of each cabin section can be controlled. It is also within the scope of the invention that the volume flows of the individual cabin sections supplied air streams can be controlled.
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 drawing unit with a draw-down channel for the filaments. According to a very preferred embodiment of the invention, a laying unit with at least one diffuser adjoins the drawing unit. This laying unit is of particular importance with regard to the solution of the technical problem according to the invention. Preferably, the laying unit or the diffuser is multi-stage, preferably formed in two stages. According to a very preferred embodiment of the invention, the laying unit consists of a first diffuser and an adjoining second diffuser. Preferably, an ambient air inlet gap is provided between the first and second diffusers. In the first diffuser, there is a reduction in the high air velocity necessary for drawing the filaments at the end of the draw channel of the drawing unit. This results in a significant pressure recovery. Preferably, an opening angle α in a lower diverging region of the first diffuser is infinitely adjustable. For this purpose, the diverging side walls of the first diffuser are pivotable. This adjustability of the diverging sidewalls may be symmetric or asymmetrical with respect to a median plane of the first diffuser. At the beginning of the second diffuser the ambient air inlet gap is provided. Due to the high exit pulse from the first diffuser stage, there is a suction of secondary air from the environment through the ambient air inlet gap. Preferably, the width of the ambient air inlet gap is adjustable. In this case, the ambient air inlet gap can preferably be adjusted so that the volume flow of the sucked secondary air is up to 30% of the incoming volume flow of the process air. Conveniently, the second diffuser is adjustable in height and although preferably arranged infinitely adjustable in height. As a result, the distance to the depositing device or to the Ablegesiebband can be varied. - It is essential that with the laying unit according to the invention with the two diffusers effective aerodynamic decoupling between the filament formation area and the storage area can be achieved. This contributes to the solution of the technical problem according to the invention.
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 a very uniform arrangement of the deposited filaments and a very uniform Spinnvliesablage can be achieved by the inventive design of the system. The invention is based in particular on the finding that the measures according to the invention as it were a filing, d. H. an individual filing of each filament can be achieved, and that disturbing influences on this filing can be largely excluded or minimized. Above all, a superposition of the orientation of the deposited filaments can be very effectively avoided with the Siebbandlaufrichtung. Due to the uniform storage a spunbond or a spunbonded web is produced, which is characterized by very homogeneous properties. Disturbing inhomogeneities, which have a disadvantageous effect on the nonwoven strength, the nonwoven elongation or the nonwoven permeability, are no longer observed. In the plant fleeces are produced with visually very high quality. In that regard, the system according to the invention is characterized by 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 .
- Fig. 1
- a vertical section through a plant according to the invention,
- Fig. 2
- the enlarged section A from the subject of the
Fig. 1 and - Fig. 3
- the enlarged detail B from the subject of the
Fig. 1 ,
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 the continuous production of a spunbonded web of aerodynamically stretched filaments of thermoplastic material. The system has a spinnerette 1 and a
In
Der
Die
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
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
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
Besondere Bedeutung kommt im Rahmen der Erfindung der Verlegeeinheit 6 zu, deren bevorzugte Ausführungsform in der
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 aggregate of cooling
Claims (10)
- A system for continuously manufacturing a spun-bonded web of aerodynamically stretched, thermoplastic filaments having a spinneret (1) dispensing the filaments, where a continuously translatable, accommodating-screen web (7), upon which the filaments of the spun-bonded web may be lain, is arranged beneath the spinneret (1), and where a suction device for inducting air through the accommodating-screen web (7) is provided on the accommodating-screen web (7), characterized in that at least two, distinct, vacuuming zones (10, 11, 12) are arranged, one after the other, along the direction of transport of the accommodating-screen web (7), one of those vacuuming zones (10, 11, 12) is a primary vacuuming zone (11) coordinated to the landing zone, and the vacuuming rates at the primary vacuuming zone (11) and the at least one other vacuuming zone (10, 12) are independently adjustable.
- A system according to claim 1, characterized in that three, distinct, vacuuming zones (10, 11, 12) are arranged, one after the other, along the direction of transport of the accommodating-screen web (7), a first vacuuming zone (10) is arranged ahead of, referred to the direction of transport of the accommodating-screen web (7), the primary vacuuming zone (11), a second vacuuming zone (12) is arranged behind, along the direction of transport, the primary vacuuming zone (11), and the vacuuming rates at all three vacuuming zones (10, 11, 12) are independently adjustable.
- A system according to one of claims 1 or 2, characterized in that the vacuuming rate at the primary vacuuming zone (11) exceeds that at the other vacuuming zones (10, 12).
- A system according to one of claims 1 - 3, characterized in that the vacuuming rate at the first vacuuming zone (10) and/or second vacuuming zone (12) ranges from 1 m/s to 6 m/s, preferably between 2 m/s to 5 m/s.
- A system according to one of claims 1 - 4, characterized in that the vacuuming rate at the primary vacuuming zone (11) ranges from 25 m/s to 35 m/s, preferably from 27 m/s to 33 m/s.
- A system according to one of claims 1 - 5, characterized in that at least one-third of the length, l2 of the second vacuuming zone (12), is arranged ahead of, referred to the direction of transport of the accommodating-screen web (7), a pressure drum (22) for the spun-bonded web.
- A system according to one of claims 1 - 6, characterized in that merely a single vacuum blower is provided for the vacuuming zones (10, 11, 12) and the vacuuming conditions at the respective vacuuming zones (10, 11, 12) are adjustable via adjusting devices and/or throttling devices.
- A system according to one of claims 1 - 7, characterized in that the primary vacuuming zone (11) is separated from the first vacuuming zone (10) by a first partition (18) and separated from the second vacuuming zone (12) by a second partition (19), and the first and second partitions (18, 19) form a nozzle profile having a narrow section (20) extending across the width of the accommodating-screen web (7).
- A system according to claim 8, characterized in that the distance between the first partition (18) and the second partition (19) at the narrow section (20) is adjustable.
- A system according to one of claims 8 or 9, characterized in that the distance between the first partition (18) and the second partition (19) in the vicinity beneath the narrow section (20) is adjustable.
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 |
DE50211736T DE50211736D1 (en) | 2002-02-28 | 2002-02-28 | Plant for the continuous production of a spunbonded web |
EP02004614A EP1340842B2 (en) | 2002-02-28 | 2002-02-28 | Apparatus for the continued production of a spunbonded web |
AT02004614T ATE386831T1 (en) | 2002-02-28 | 2002-02-28 | SYSTEM FOR THE CONTINUOUS PRODUCTION OF A SPUNNOVED 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)
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 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1340842A1 EP1340842A1 (en) | 2003-09-03 |
EP1340842B1 true EP1340842B1 (en) | 2008-02-20 |
EP1340842B2 EP1340842B2 (en) | 2010-12-08 |
Family
ID=27675664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02004614A Expired - Lifetime EP1340842B2 (en) | 2002-02-28 | 2002-02-28 | Apparatus for the continued production of a spunbonded web |
Country Status (10)
Country | Link |
---|---|
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) |
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DE10333784A1 (en) * | 2003-07-24 | 2005-02-24 | Yao-Chang Lin | Production of non-woven fabric, involves passing filaments extruded from fiber forming resin through cooling device, rollers and heater, stretching filaments, and forming filaments into non-woven fabric on conveyor screen belt |
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EP1726700B1 (en) * | 2005-05-25 | 2013-02-27 | Reifenhäuser GmbH & Co. KG Maschinenfabrik | Process and device for making a nonwoven fabric |
EP2061919B1 (en) * | 2006-11-10 | 2013-04-24 | Oerlikon Textile GmbH & Co. KG | Process and device for melt-spinning and cooling synthetic filaments |
EP1939334B1 (en) * | 2006-12-15 | 2010-02-24 | FARE' S.p.A. | Apparatus and process for the production of a spunbond web |
ATE502141T1 (en) * | 2007-01-31 | 2011-04-15 | Oerlikon Textile Gmbh & Co Kg | METHOD AND DEVICE FOR SUCTION AND DEPOSITION OF MULTIPLE FIBERS TO FORM A NON-WOVEN MATERIAL |
US8246898B2 (en) * | 2007-03-19 | 2012-08-21 | Conrad John H | Method and apparatus for enhanced fiber bundle dispersion with a divergent fiber draw unit |
EP2009163B1 (en) * | 2007-06-29 | 2013-10-02 | Reifenhäuser GmbH & Co. KG Maschinenfabrik | Method for manufacturing non woven material |
TWI345007B (en) * | 2008-12-24 | 2011-07-11 | Taiwan Textile Res Inst | Spunbonding apparatus |
EP2584076B1 (en) * | 2011-10-22 | 2017-01-11 | 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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US20140272359A1 (en) | 2013-03-15 | 2014-09-18 | The Procter & Gamble Company | Nonwoven substrates |
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US9504610B2 (en) | 2013-03-15 | 2016-11-29 | The Procter & Gamble Company | Methods for forming absorbent articles with nonwoven substrates |
US20140259483A1 (en) | 2013-03-15 | 2014-09-18 | The Procter & Gamble Company | Wipes with improved properties |
EP3049562A4 (en) * | 2013-09-26 | 2017-05-03 | Reliance Industries Limited | System, method and device for quenching synthetic multifilament fibers |
EP2907909B1 (en) * | 2014-02-17 | 2017-08-09 | Reifenhäuser GmbH & Co. KG Maschinenfabrik | Assembly for the continuous production of a woven material |
DK3088585T3 (en) * | 2015-04-27 | 2017-09-25 | Reifenhäuser Gmbh & Co Kg Maschf | Method and apparatus for making a nonwoven fabric of filaments and nonwoven fabric |
EP4082500A1 (en) | 2015-07-31 | 2022-11-02 | The Procter & Gamble Company | Package of absorbent articles utilizing a shaped nonwoven |
US10190244B2 (en) | 2015-07-31 | 2019-01-29 | The Procter & Gamble Company | Forming belt for shaped nonwoven |
CN107190424A (en) * | 2016-03-15 | 2017-09-22 | 常州阿尔丰机械有限公司 | A kind of nonwoven production diffuser and its method of work |
SI3239378T1 (en) | 2016-04-29 | 2019-06-28 | Reifenhaeuser Gmbh & Co. Kg Maschinenfabrik | Device and method for the manufacture of material from continuous filaments |
PL3382081T3 (en) * | 2017-03-31 | 2020-03-31 | Reifenhäuser GmbH & Co. KG Maschinenfabrik | Device for the manufacture of woven material from continuous filaments |
EP3714086A4 (en) | 2017-11-22 | 2021-10-06 | Extrusion Group, LLC | Meltblown die tip assembly and method |
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US11913151B2 (en) | 2021-01-11 | 2024-02-27 | Fitesa Simpsonville, Inc. | Nonwoven fabric having a single layer with a plurality of different fiber types, and an apparatus, system, and method for producing same |
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-
2002
- 2002-02-28 DK DK02004614.0T patent/DK1340842T4/en active
- 2002-02-28 AT AT02004614T patent/ATE386831T1/en active
- 2002-02-28 ES ES02004614T patent/ES2298302T5/en not_active Expired - Lifetime
- 2002-02-28 EP EP02004614A patent/EP1340842B2/en not_active Expired - Lifetime
- 2002-02-28 DE DE50211736T patent/DE50211736D1/en not_active Expired - Lifetime
-
2003
- 2003-02-27 CN CNB031067190A patent/CN1325714C/en not_active Expired - Lifetime
- 2003-02-27 CZ CZ2003-583A patent/CZ305996B6/en unknown
- 2003-02-27 US US10/375,895 patent/US6932590B2/en not_active Expired - Lifetime
- 2003-02-27 JP JP2003051111A patent/JP4294975B2/en not_active Expired - Lifetime
- 2003-02-28 KR KR1020030012659A patent/KR100910605B1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
DK1340842T3 (en) | 2008-06-16 |
EP1340842B2 (en) | 2010-12-08 |
CN1441105A (en) | 2003-09-10 |
ES2298302T5 (en) | 2011-02-24 |
KR100910605B1 (en) | 2009-08-03 |
JP4294975B2 (en) | 2009-07-15 |
ATE386831T1 (en) | 2008-03-15 |
CZ2003583A3 (en) | 2003-10-15 |
CN1325714C (en) | 2007-07-11 |
JP2003268619A (en) | 2003-09-25 |
EP1340842A1 (en) | 2003-09-03 |
CZ305996B6 (en) | 2016-06-15 |
US20030161904A1 (en) | 2003-08-28 |
KR20030071574A (en) | 2003-09-03 |
ES2298302T3 (en) | 2008-05-16 |
DK1340842T4 (en) | 2011-03-28 |
US6932590B2 (en) | 2005-08-23 |
DE50211736D1 (en) | 2008-04-03 |
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