EP2325362B1 - Verfahren und Zusammenstellung zum Fertigen eines Mineralfasergewebes - Google Patents

Verfahren und Zusammenstellung zum Fertigen eines Mineralfasergewebes Download PDF

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Publication number
EP2325362B1
EP2325362B1 EP10160824A EP10160824A EP2325362B1 EP 2325362 B1 EP2325362 B1 EP 2325362B1 EP 10160824 A EP10160824 A EP 10160824A EP 10160824 A EP10160824 A EP 10160824A EP 2325362 B1 EP2325362 B1 EP 2325362B1
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EP
European Patent Office
Prior art keywords
fibre web
primary
secondary fibre
surface weight
longitudinal direction
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Revoked
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EP10160824A
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English (en)
French (fr)
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EP2325362A2 (de
EP2325362A3 (de
Inventor
Tommy Lindgren
Erik ÅSTRAND
Bjarne Walli
Lasse Johansson
Vesa Lehto
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Paroc Hold Oy AB
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Paroc Oy AB
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Application filed by Paroc Oy AB filed Critical Paroc Oy AB
Priority to PL10160824T priority Critical patent/PL2325362T3/pl
Publication of EP2325362A2 publication Critical patent/EP2325362A2/de
Publication of EP2325362A3 publication Critical patent/EP2325362A3/de
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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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/736—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged characterised by the apparatus for arranging fibres
    • D—TEXTILES; PAPER
    • 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
    • D04H13/00—Other non-woven fabrics
    • D04H13/008—Glass fibre products; Complete installations for making them

Definitions

  • the invention relates to a method and an arrangement for manufacturing a mineral fibre web according to the preambles of the independent claims presented further below.
  • Mineral fibres are manufactured by melting suitable mineral-containing raw materials, such as diabase, limestone or slag in a melting furnace. The obtained melt is led to a fiberising apparatus, where it is formed into mineral fibres.
  • a cascade-type fiberiser may typically be used as a fiberising apparatus, the cascade-type fiberiser typically comprising four fiberising rotors which rotate around a horizontal or nearly horizontal axis. The axes of the fiberising rotors are typically arranged on different heights.
  • Melt is fed to the mantle surface of the first fiberising rotor, where a part of it adheres. Other part of the melt is thrown towards the mantle surface of the second fiberising rotor.
  • the melt which has got a hold of respective rotors' mantle surface, is by means of centrifugal force formed into fibres, which detach from the melt rings on the fiberising rotors.
  • Mineral fibres may also be manufactured by feeding mineral melt into a rotating cup-like centrifuge. On the outer circumference of the centrifuge cup have been arranged holes through which mineral melt is thrown, forming at the same time mineral fibres.
  • the detachment of the fibres, their trajectory after detachment, and also their qualitative properties may be assisted by arranging air blows near or around the fiberising apparatus, the force and the direction of which air blows may be used to influence also the properties of the forming fibres.
  • the fibres are directed from the fiberising apparatus to a moving collecting member, for example to an inclined conveyor or a rotating drum, arranged in front of the fiberising apparatus, in the second end of the collecting chamber. Binder is also generally added to the fibres before their collection.
  • a continuous primary mineral fibre web i.e. a primary fibre web, is thus formed on the collecting member, which web is transferred with the aid of conveyors from the collecting member to be processed further.
  • the aim is to collect the primary fibre web as thin and light as possible onto the collecting member. It is possible to collect a primary fibre web, the surface weight of which corresponds to the surface weight of the final product, but then an uneven result is often obtained, and the orientation of the fibres cannot be controlled to a sufficient extent. In practise a light primary fibre web is therefore collected, from which a secondary fibre web having a desired weight is formed later in the process, for example by folding.
  • Publication EP 1997944 discloses a method for manufacturing mineral wool.
  • surface weight of the mineral fibre web is measured in several locations with a method based on the attenuation of x-rays before the web is cured.
  • the results are used to control at least one process parameter.
  • the process parameter is controlled based on a measurement result obtained from the process. This may lead to "swaying" of the process and to complicated adjustment procedures.
  • One object of the present invention is to reduce or even eliminate the above-mentioned problems, which appear in the prior art.
  • One object of the present invention is to provide a method, with which variations occurring in the surface weight of the secondary fibre web can be minimised.
  • a typical method according to the invention for manufacturing a mineral fibre web and for improving the homogeneity of the manufactured fibre web comprises
  • a typical arrangement according to the invention for manufacturing a mineral fibre web comprises
  • the folding of the primary fibre web may be performed normally by using folding means, such as for example a pendulum conveyor, which may comprise for example two vertical conveyor elements placed against each other, between which the primary fibre web is guided.
  • the upper end of the pendulum conveyor is attached to a supporting point and its lower part is allowed to perform a pendulum motion in the lateral direction of a receiving conveyor.
  • the primary web is discharged from the lower part of the pendulum conveyor, from the space between the conveyor elements placed against each other to the moving receiving conveyor, where it is arranged into partially overlapping layers.
  • the primary web forms a fold at the edges of the receiving conveyor, where the pendulum conveyor changes its direction of motion during the folding process.
  • the folded primary web forms the secondary web.
  • the whole number representing the number of folds of the fibre web in the vertical direction of the secondary fibre web may be determined by observing the secondary fibre web from the side and by counting the folds of the fibre web located on the perpendicular vertical line drawn from its first large surface to its second large surface.
  • the observation direction is thus at a 90 degree angle in relation to the advancing direction of the secondary fibre web.
  • the observation direction is at a 90 degree angle also in relation to the lateral direction of the secondary fibre web, which is at a 90 degree angle in relation to the advancing direction of the secondary fibre web.
  • the whole number representing the number of folds is typically between 1-50, more typically between 2-40, most typically between 3-30.
  • the whole number may also preferably be between 5-15, sometimes preferably between 6-12.
  • a production value for the surface weight of the primary fibre web to be formed is determined with the aid of the target surface weight of the secondary fibre web and the whole number representing the number of folds in the vertical direction of the secondary fibre web. This means that the surface weight of the primary fibre web to be formed is selected based on the target surface weight of the secondary fibre web and the number of folds to be produced. Typically the surface weight of the primary fibre web varies between 200-375 g/m 2 , more typically between 250-350 g/m 2 .
  • a surface weight for the primary fibre web is defined on the basis of these values, which surface weight is within the variation interval allowed by the process and with which the target values of the predetermined variables may be obtained.
  • the selected surface weight of the primary fibre web to be collected may be obtained by adjusting other suitable process parameters, for example by altering the speed of the collecting member.
  • the speed of the collecting member is altered to be suitable for the production process, i.e. the speed of the collecting member is not too slow, whereby the collected primary fibre web would become too heavy to be processed in the subsequent process devices, and neither too fast, which would cause problems in coordinating the speeds of the subsequent process devices.
  • the speed of the collecting member is selected to vary between 40-250 m/s, more typically 50-200 m/s. It is possible to influence the surface weight of the primary fibre web also by adjusting the amount of mineral fibres to be formed, i.e. by increasing or decreasing the amount of formed fibres.
  • the number of folds in the vertical direction of the secondary fibre web is essentially the same in two different locations of the secondary fibre web, which are situated at a distance from each other in the longitudinal direction, i.e. travel direction, of the secondary web.
  • the number of folds in the vertical direction of the secondary fibre web is most preferably essentially the same in every location of the secondary fibre web, i.e. the whole number representing the number of folds of the fibre web in the vertical direction of the secondary fibre web is thus preferably constant in every location of the secondary fibre web in the travel direction of the web.
  • the first end of the first fold of the primary fibre web on the first large surface of the secondary fibre web is in the vertical direction essentially at the same perpendicular line with the second end of the second fold of the primary fibre web on the second large surface of the secondary fibre web.
  • first and second fold there may be an optional number of folds, having first and second ends which are arranged at the same vertical line with the ends of the other folds in a corresponding manner.
  • the folds of the primary fibre web and their number may be observed with observation and/or viewing means, for example with a camera, which may have been operationally connected to a picture recognition unit.
  • a picture recognition unit With the aid of the picture recognition unit or picture recognition system, the number of folds of the primary fibre web, which form the edge of the formed secondary fibre web, and their position in relation to each other, may automatically be determined. If a deviation is noticed in the number of folds, the folding process may be corrected, for example by altering the speed of the receiving conveyor.
  • the true surface weight of the secondary fibre web is measured at predetermined intervals, even continuously, and with the aid of the measured surface weight and the selected selection variable, the production value of the unselected selection variable is redetermined at predetermined intervals, and the manufacturing process is adjusted to obtain the production value.
  • the redetermination of the production value of the unselected selection variable may be performed automatically or the process operator may perform the redetermination of the production values by manually adjusting.
  • the weight of the primary and/or secondary fibre web may be measured with the aid of a weighing conveyor.
  • Figure 1 shows an exemplary arrangement according to the invention.
  • FIG 1 is shown an exemplary arrangement according to the present invention.
  • a primary fibre web 1 is folded with folding means 2, which move as a pendulum from one side to the other perpendicularly out from the level of the paper.
  • folding means 2 which move as a pendulum from one side to the other perpendicularly out from the level of the paper.
  • the primary fibre web is arranged into folds 3, 3', 3", 3"', which are arranged partly overlapping each other, and which form a secondary fibre web 4, which has a first large surface 4' and a second large surface 4".
  • the first edge 1' of the primary fibre web 1 forms an essential part of the first large surface 4' of the secondary fibre web 4 and correspondingly the second edge 1" of the primary fibre web 1 forms an essential part of the second large surface 4" of the secondary fibre web 4.
  • the primary fibre web 1 comprises mineral fibres, which are generally mainly arranged in the advancing direction of the primary fibre web, which in Figure 1 has been shown with an arrow A.
  • the primary fibre web generally also comprises one or several binders, possibly also other additives, such as fire retardants. Additives and/or binders may be added to the web in connection with the folding or just before the folding.
  • the secondary fibre web formed of the folded primary fibre web 1 is formed on the receiving conveyor 5, by adjusting the advancing speed of which the angle and number of the folds 3, 3', 3", 3"', and thus also the thickness and surface weight of the secondary fibre web may be adjusted. From the receiving conveyor 5 the secondary fibre web is transferred to a further conveyor 6, which may for example be a weighing conveyor, with which the surface weight of the formed secondary fibre web may be measured.
  • the secondary fibre web is thus formed of folds 3, 3', 3", 3", the first ends 31, 31' of which are located on the first large surface 4' of the secondary fibre web 4 and the second ends 32, 32' on the second large surface 4" of the secondary fibre web 4.
  • the folds 3", 3"' are arranged so that the first end 31 of the fold 3" on the first large surface 4' is in the vertical direction on the same line as the second end 32' of the fold 3"' on the second large surface 4".
  • the location of the ends 31, 32' on the same imaginary line is illustrated in Figure 1 with dotted lines.
  • the variation occurring in the surface weight of the secondary fibre web may be minimised and a web may be obtained, the surface weight of which remains within the limits of a very small variation interval.
  • the folding may be monitored with viewing means (not shown), which may have been connected to the process monitoring and controlling system.
  • the target surface weight of the secondary fibre web m sek to be manufactured is selected as 3 kg/m 2 .
  • the number of folds n, is selected as the selected selection variable, which is given the value 10.
  • the surface weight of the primary fibre web m prim may easily be calculated by m/n, whereby the value 0,3 kg/m 2 is obtained.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Nonwoven Fabrics (AREA)

Claims (10)

  1. Verfahren zur Herstellung eines Mineralfaservlieses, welches Verfahren umfasst:
    - Erzeugen von Mineralfasern mit einer Entstippereinrichtung,
    - Auffangen der erzeugten Mineralfasern auf einem sich bewegenden Auffangelement und Bilden eines primären Faserendlosvlieses, welches primäre Faservlies Ränder aufweist und eine erste Längsrichtung festlegt, die parallel zu den Rändern verläuft, wobei das primäre Faservlies hauptsächlich Fasern enthält, die in der ersten Längsrichtung angeordnet sind,
    - Weiterleiten des primären Faservlieses in der ersten Längsrichtung,
    - Anordnen des primären Faservlieses in teilweise überlappende Lagen quer zur ersten Längsrichtung durch Falten zur Bildung eines sekundären Faservlieses, welches sekundäre Faservlies eine zweite Längsrichtung und eine erste Querrichtung festlegt, wobei das sekundäre Faservlies somit hauptsächlich Fasern enthält, die quer zur zweiten Längsrichtung angeordnet sind, und welches sekundäre Faservlies eine erste und eine zweite parallele große Oberfläche aufweist, welche großen Oberflächen die Ränder des primären Faservlieses aufweisen, wobei der Abstand zwischen diesen Oberflächen die Höhenrichtung des sekundären Faservlieses festlegt, welche Höhenrichtung senkrecht zur zweiten Längsrichtung und ersten Querrichtung verläuft, wobei die Falten im primären Faservlies die Seitenränder des sekundären Faservlieses bilden,
    gekennzeichnet durch
    - Auswählen eines Zielgewichts für die Oberfläche des sekundären Faservlieses und einer der folgenden Auswahlgrößen:
    i) eine ganze Zahl, die für die Anzahl von Falten in der vertikalen Richtung des sekundären Faservlieses steht, wobei die ganze Zahl zwischen 1 und 50 liegt, oder
    ii) Oberflächengewicht des aufzufangenden primären Faservlieses,
    wobei der Produktionswert der nicht ausgewählten Auswahlgröße mit Hilfe des Zielgewichts für die Oberfläche des sekundären Faservlieses und der ausgewählten Auswahlgröße ermittelt wird und der Herstellungsprozess zur Erzielung des Produktionswerts eingestellt wird.
  2. Verfahren nach Anspruch 1, gekennzeichnet durch das Ermitteln des Produktionswerts für das Oberflächengewicht des aufzufangenden primären Faservlieses mit Hilfe des Zielgewichts für die Oberfläche des sekundären Faservlieses und der für die Anzahl von Falten in der vertikalen Richtung des sekundären Faservlieses stehenden ganzen Zahl.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das ausgewählte oder ermittelte Zielgewicht für die Oberfläche des aufzufangenden primären Faservlieses durch Ändern der Geschwindigkeit des Auffangelements erzielt wird.
  4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Anzahl von Falten in der vertikalen Richtung des sekundären Faservlieses im Wesentlichen gleich an zwei Stellen des sekundären Faservlieses ist, welche Stellen in Längsrichtung voneinander beabstandet sind.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass das erste Ende der ersten Falte des primären Faservlieses auf der ersten großen Oberfläche des sekundären Faservlieses in der vertikalen Richtung im Wesentlichen an derselben Senkrechten wie das zweite Ende der zweiten Falte des primären Faservlieses auf der zweiten großen Oberfläche liegt.
  6. Verfahren nach einem der vorangehenden Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das echte Oberflächengewicht des sekundären Faservlieses zu vorherbestimmten Zeitintervallen gemessen wird und der Produktionswert der nicht ausgewählten Auswahlgröße mit Hilfe des gemessenen Oberflächengewichts und der ausgewählten Auswahlgröße zu vorherbestimmten Zeitintervallen neuerlich ermittelt wird und der Herstellungsprozess zur Erzielung des Produktionswerts eingestellt wird.
  7. Vorrichtung zur Herstellung eines Mineralfaservlieses, welche Vorrichtung aufweist:
    - mindestens eine Entstippereinrichtung zur Erzeugung von Mineralfasern,
    - Blasmittel zum Wegblasen der Mineralfasern von der Entstippereinrichtung,
    - ein sich bewegendes Auffangelement, das vor der Entstippereinrichtung angeordnet ist und auf dem die weggeblasenen Mineralfasern als primäres Faserendlosvlies aufgefangen werden, welches Ränder aufweist und eine erste Längsrichtung festlegt, die parallel zu den Rändern verläuft,
    - Transfermittel zum Weiterleiten des primären Faservlieses weg vom Auffangelement,
    - Faltmittel zum Falten des primären Faservlieses in teilweise überlappende Lagen quer zur ersten Längsrichtung zur Bildung eines sekundären Faserendlosvlieses, welches sekundäre Faservlies die zweite Längsrichtung und die erste Querrichtung festlegt, wobei das sekundäre Faservlies somit hauptsächlich Fasern enthält, die quer zur zweiten Längsrichtung angeordnet sind, und welches sekundäre Faservlies eine erste und eine zweite parallele große Oberfläche aufweist, welche Oberflächen Ränder des primären Faservlieses aufweisen, und wobei der Abstand zwischen diesen Oberflächen die Höhenrichtung des sekundären Faservlieses festlegt, die senkrecht zur zweiten Längsrichtung und ersten Querrichtung verläuft, wobei die Falten im primären Faservlies die Seitenränder des sekundären Faservlieses bilden,
    - Wägemittel zum Ermitteln des Oberflächengewichts des sekundären Faservlieses,
    dadurch gekennzeichnet, dass
    die Vorrichtung weiters aufweist:
    - Optimierungsmittel, in die bzw. denen ein Zielgewicht für die Oberfläche des sekundären Faservlieses und einer der für die folgenden Auswahlgrößen stehenden nummerischen Werte eingegeben und/oder gespeichert sind:
    i) eine ganze Zahl, die für die Anzahl von Falten in der vertikalen Richtung des sekundären Faservlieses steht, wobei die ganze Zahl zwischen 1 und 50 liegt, oder
    ii) Oberflächengewicht des aufzufangenden primären Faservlieses,
    - Wägemittel zum Ermitteln des Oberflächengewichts des primären Faservlieses,
    - Rechenmittel, mit denen ein Produktionswert der nicht ausgewählten Auswahlgröße mit Hilfe des Zielgewichts für die Oberfläche des sekundären Faservlieses und des nummerischen Werts der ausgewählten Auswahlgröße ermittelt wird, welche in die bzw. den Optimierungsmittel(n) eingegeben und/oder gespeichert sind, und
    - Einstellmittel zum Einstellen des Herstellungsprozesses und zur Erzielung des ermittelten Produktionswerts.
  8. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass die Vorrichtung Beobachtungsmittel zur Ermittlung der Anzahl von Falten des sekundären Faservlieses in der vertikalen Richtung aufweist.
  9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass sie eine automatische Bilderkennungseinheit aufweist, die in Verbindung mit den Beobachtungsmitteln angeordnet ist.
  10. Vorrichtung nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, dass die Wägemittel einen Wägeförderer aufweisen.
EP10160824A 2009-04-27 2010-04-23 Verfahren und Zusammenstellung zum Fertigen eines Mineralfasergewebes Revoked EP2325362B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10160824T PL2325362T3 (pl) 2009-04-27 2010-04-23 Sposób oraz układ do wytwarzania wstęgi z włókien mineralnych

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20095465A FI20095465A (fi) 2009-04-27 2009-04-27 Menetelmä ja järjestelmä mineraalikuitumaton valmistamiseksi

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EP2325362A2 EP2325362A2 (de) 2011-05-25
EP2325362A3 EP2325362A3 (de) 2011-12-07
EP2325362B1 true EP2325362B1 (de) 2012-07-11

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EP10160824A Revoked EP2325362B1 (de) 2009-04-27 2010-04-23 Verfahren und Zusammenstellung zum Fertigen eines Mineralfasergewebes

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1997944A1 (de) * 2007-05-11 2008-12-03 Rockwool International A/S Verfahren zur Herstellung von Mineralwolle

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FI20095465A0 (fi) 2009-04-27
EP2325362A2 (de) 2011-05-25
PL2325362T3 (pl) 2012-11-30
FI20095465A (fi) 2010-10-28
EP2325362A3 (de) 2011-12-07

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