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EP2325362B1 - Procédé et arrangement de production d'une bande en fibres minérales - Google Patents

Procédé et arrangement de production d'une bande en fibres minérales 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
Authority
EP
European Patent Office
Prior art keywords
fibre web
primary
secondary fibre
surface weight
longitudinal direction
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.)
Revoked
Application number
EP10160824A
Other languages
German (de)
English (en)
Other versions
EP2325362A2 (fr
EP2325362A3 (fr
Inventor
Tommy Lindgren
Erik ÅSTRAND
Bjarne Walli
Lasse Johansson
Vesa Lehto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Paroc Hold Oy AB
Original Assignee
Paroc Oy AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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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/fr
Publication of EP2325362A3 publication Critical patent/EP2325362A3/fr
Application granted granted Critical
Publication of EP2325362B1 publication Critical patent/EP2325362B1/fr
Revoked legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • 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

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. Procédé de fabrication d'une bande en fibres minérales, lequel comprend le fait de :
    - produire des fibres minérales avec un appareil de fabrication de fibres,
    - collecter les fibres minérales produites sur un élément de collecte se déplaçant et former une bande primaire continue en fibres, bande primaire en fibres qui présente des bordures et qui définit une première direction longitudinale, laquelle est parallèle aux bordures, la bande primaire en fibres comprenant principalement des fibres disposées suivant la première direction longitudinale,
    - transférer la bande primaire en fibres suivant la première direction longitudinale,
    - agencer en la pliant la bande primaire en fibres en couches se superposant partiellement de façon transverse à la première direction longitudinale afin de former une bande secondaire en fibres, de sorte que la bande secondaire en fibres définit une seconde direction longitudinale et une première direction transversale, la bande secondaire en fibres comportant ainsi principalement des fibres disposées transversalement à la seconde direction longitudinale, et laquelle bande secondaire en fibres présente des première et seconde grandes surfaces parallèles, lesquelles grandes surfaces comportent les bordures de la bande primaire en fibres et la distance comprise entre ces surfaces définit la direction de la hauteur de la bande secondaire en fibres, direction de hauteur qui est perpendiculaire à la seconde direction longitudinale et à la première direction transversale, les plis de la bande primaire en fibres formant les bordures latérales de la bande secondaire en fibres,
    caractérisé par
    - la sélection d'un poids cible par unité de surface de la bande secondaire en fibres et l'une des variables de sélection suivantes :
    i) un nombre entier représentant le nombre de plis dans la direction verticale de la bande secondaire en fibres, le nombre entier se situant entre 1 et 50 ou
    ii) le poids par unité de surface de la bande primaire en fibres à collecter,
    de sorte que la valeur de production de la variable de sélection non retenue est déterminée à l'aide du poids cible par unité de surface de la bande secondaire en fibres et de la variable de sélection retenue, et le procédé de fabrication est réglé en vue d'obtenir la valeur de production.
  2. Procédé selon la revendication 1, caractérisé par la détermination de la valeur de production du poids par unité de surface de la bande primaire en fibres à collecter à l'aide du poids cible par unité de surface de la bande secondaire en fibres et du nombre entier représentant le nombre de plis dans la direction verticale de la bande secondaire en fibres.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le poids cible par unité de surface déterminé ou sélectionné de la bande primaire en fibres à collecter est obtenu en modifiant la vitesse de l'élément de collecte.
  4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que le nombre de plis dans la direction verticale de la bande secondaire en fibres est essentiellement le même en deux endroits de la bande secondaire en fibres, lesquels endroits se trouvent à distance l'un de l'autre dans la direction longitudinale.
  5. Procédé selon la revendication 4, caractérisé en ce que la première extrémité du premier pli de la bande primaire en fibres sur la première grande surface de la bande secondaire en fibres se trouve dans la direction verticale essentiellement au niveau de la même ligne perpendiculaire que la seconde extrémité du second pli de la bande primaire en fibres sur la seconde grande surface.
  6. Procédé selon l'une quelconque des revendications précédentes 1 à 5, caractérisé en ce que le poids par unité de surface réel de la bande secondaire en fibres est mesuré à intervalles de temps prédéterminés, et à l'aide du poids par unité de surface mesuré et de la variable de sélection retenue, la valeur de production de la variable de sélection non retenue est déterminée à nouveau à des intervalles de temps prédéterminés, et le process de fabrication est réglé pour obtenir la valeur de production.
  7. Agencement permettant la fabrication d'une bande en fibres minérales, lequel comporte :
    - au moins un appareil de fabrication de fibres pour produire des fibres minérales,
    - des moyens de soufflage pour évacuer par soufflage les fibres minérales hors de l'appareil de fabrication de fibres,
    - un élément de collecte se déplaçant disposé en face de l'appareil de fabrication de fibres, sur lequel les fibres minérales soufflées sont collectées sous la forme d'une bande primaire continue en fibres, laquelle présente des bordures et laquelle bande définit une première direction longitudinale, laquelle est parallèle aux bordures,
    - des moyens de transfert pour transporter la bande primaire en fibres à distance de l'élément de collecte,
    - des moyens de pliage pour plier la bande primaire en fibres en couches se superposant partiellement de façon transverse à la première direction longitudinale afin de former une bande secondaire en fibres continue, de sorte que la bande secondaire en fibres définit la seconde direction longitudinale et la première direction transversale, la bande secondaire en fibres comportant ainsi principalement des fibres disposées transversalement à la seconde direction longitudinale, et laquelle bande secondaire en fibres présente une première et une seconde grande surface parallèle, lesquelles surfaces comportent les bordures de la bande primaire en fibres et la distance comprise entre ces surfaces définit la direction de hauteur de la bande secondaire en fibres, laquelle est perpendiculaire à la seconde direction longitudinale et à la première direction transversale, les plis de la bande primaire en fibres formant les bordures latérales de la bande secondaire en fibres,
    - des moyens de pesage permettant de déterminer le poids par unité de surface de la bande secondaire en fibres,
    caractérisé en ce que
    l'agencement comprend, de plus,
    - des moyens d'optimisation dans lesquels un poids cible par unité de surface de la bande secondaire en fibres et l'une des valeurs numériques représentant les variables de sélection suivantes sont fournis et/ou stockés:
    i) un nombre entier représentant le nombre de plis dans la direction verticale de la bande secondaire en fibres, le nombre entier se trouvant entre 1 et 50, ou
    ii) le poids par unité de surface de la bande primaire en fibres à collecter,
    - des moyens de pesage pour déterminer le poids par unité de surface de la bande primaire en fibres,
    - des moyens de calcul avec lesquels une valeur de production de la variable de sélection non retenue est déterminée à l'aide du poids cible par unité de surface de la bande secondaire en fibres et de la valeur numérique de la variable de sélection retenue fournies et/ou stockées dans les moyens d'optimisation, et
    - des moyens de réglage permettant de régler le processus de fabrication et d'obtenir la valeur de production déterminée.
  8. Agencement selon la revendication 7, caractérisé en ce que l'agencement comprend des moyens d'observation pour déterminer le nombre de plis dans la direction verticale de la bande secondaire en fibres.
  9. Agencement selon la revendication 8, caractérisé en ce qu'il comporte une unité de reconnaissance d'image automatique, laquelle est agencée en connexion avec les moyens d'observation.
  10. Agencement selon l'une quelconque des revendications 7 à 9, caractérisé en ce que les moyens de pesage comportent un transporteur de pesage.
EP10160824A 2009-04-27 2010-04-23 Procédé et arrangement de production d'une bande en fibres minérales Revoked EP2325362B1 (fr)

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 FI20095465A7 (fi) 2009-04-27 2009-04-27 Menetelmä ja järjestelmä mineraalikuitumaton valmistamiseksi

Publications (3)

Publication Number Publication Date
EP2325362A2 EP2325362A2 (fr) 2011-05-25
EP2325362A3 EP2325362A3 (fr) 2011-12-07
EP2325362B1 true EP2325362B1 (fr) 2012-07-11

Family

ID=40590344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10160824A Revoked EP2325362B1 (fr) 2009-04-27 2010-04-23 Procédé et arrangement de production d'une bande en fibres minérales

Country Status (3)

Country Link
EP (1) EP2325362B1 (fr)
FI (1) FI20095465A7 (fr)
PL (1) PL2325362T3 (fr)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1997944A1 (fr) 2007-05-11 2008-12-03 Rockwool International A/S Procédé pour la fabrication de laine minérale

Also Published As

Publication number Publication date
EP2325362A2 (fr) 2011-05-25
PL2325362T3 (pl) 2012-11-30
FI20095465A (fi) 2010-10-28
FI20095465A0 (fi) 2009-04-27
FI20095465A7 (fi) 2010-10-28
EP2325362A3 (fr) 2011-12-07

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