EP0617701A1 - A device in a mineral wool production line - Google Patents

A device in a mineral wool production line

Info

Publication number
EP0617701A1
EP0617701A1 EP93900201A EP93900201A EP0617701A1 EP 0617701 A1 EP0617701 A1 EP 0617701A1 EP 93900201 A EP93900201 A EP 93900201A EP 93900201 A EP93900201 A EP 93900201A EP 0617701 A1 EP0617701 A1 EP 0617701A1
Authority
EP
European Patent Office
Prior art keywords
conveyor
weighing
wool mat
wool
mat
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.)
Ceased
Application number
EP93900201A
Other languages
German (de)
French (fr)
Inventor
Henning Laur N
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
Application filed by Paroc Oy AB filed Critical Paroc Oy AB
Publication of EP0617701A1 publication Critical patent/EP0617701A1/en
Ceased legal-status Critical Current

Links

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
    • D04H13/00—Other non-woven fabrics
    • 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
    • D04H1/40—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
    • D04H1/4218—Glass fibres
    • D04H1/4226—Glass fibres characterised by the apparatus for manufacturing the glass fleece
    • 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
    • D04H1/74—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 orientated, e.g. in parallel (anisotropic fleeces)

Definitions

  • the present invention relates to a device in a mineral wool production line, in which production
  • a mineral melt converted into fibres is collect ⁇ ed so as to form a thin primary wool mat on a convey ⁇ or, which leads to a suspended swing tray conveyor depositing the primary wool mat on a receiving con ⁇ veyor so as to form a secondary wool mat comprising 10 several layers.
  • a mineral melt is converted into fibres by means of a spinning machine provided with a blow-off blowing the fibres formed into a fibre collecting chamber, while unde- 15 fibrated solidified small melt particles, called beads, are separated from the fibre.
  • the formed fibre is collected on a conveyor so as to form a thin fibre mat, called primary wool mat, which is transported further to a suspended swing tray conveyor depositing 20 it on a slow moving receiving conveyor. Through this is formed a secondary wool mat comprising many lay ⁇ ers.
  • pendulous deposition is to re ⁇ cute the variations in volume weight of the secondary 25 wool mat in order to provide an even wool distribu ⁇ tion across the breadth of the whole production line.
  • the primary wool mat with a surface weight of 200 to 400 g per m 2 is deposited pendulously so as to form a secondary wool mat having usually at least six 30 layers on a receiving conveyor, which moves at a 90° angle towards the arriving wool mat and runs at syn ⁇ chronous speed with the subsequent line.
  • the volume weight or the surface weight is one of the
  • the fibre production varies per time unit and thus also the surface weight of the primary mat.
  • the speed of the receiving conveyor is control ⁇ led in order to compensate for these variations in the primary mat, for which compensation have been used different measuring signals, such as power con- sumption of the spinning machine, underpressure in the wool collecting chamber etc., in order to obtain an early indication of changes in the momentary vol ⁇ ume of the fibre production per time unit.
  • aux ⁇ iliary signals are not absolute and there is no sta- ble connection between these signals and the fibre production.
  • Another known method is to weigh the pendulous ⁇ ly ready-deposited secondary wool mat and to regulate the speed of the receiving conveyor by means of pre ⁇ viously mentioned auxiliary signals, which are cor- rected by means of the surface weight signal from the pendulously deposited wool.
  • a subsequent weighing of the deposited wool mat has a rather long time delay, till it can give a cor ⁇ rection signal to a surface weight regulator, whereby several metres of deposited wool mat can have an in- correct surface weight. Normally it is expected that a surface weight accuracy of ⁇ 3-4 % can be reached by above regulating methods.
  • a sophisticated computer programme is required so as to calculate when the primary wool mat is deposited on the receiv ⁇ ing conveyor so that this can start and stop at the correct moment to avoid a too big accumulation of wool or an idle running of the receiving conveyor.
  • the object of the invention is to provide a new device, by means of which above drawbacks can be avoided and a higher accuracy of the surface weight of the pendulously deposited secondary wool mat can be achieved.
  • the device according to the invention is mainly characterized in that the receiving conveyor com ⁇ prises a portion positioned substantially below the suspended swing tray conveyor and provided with means for weighing the surface weight of the secondary wool mat formed on said portion and that the weighing means are connected through a regulator to a driving motor of said portion in order to control its speed in such a way that, in spite of variations in the surface weight of the primary wool mat, a secondary wool mat with an accurately constant surface weight is obtained.
  • the speed of the portion of the receiving con ⁇ veyor weighing according to the invention can be reg- ulated in such a way that the surface weight of the pendulously deposited wool mat is all the time kept constant on an adjusted level with an accuracy better than ⁇ 1 %.
  • the weighing portion of the receiving con- veyor i.e. the so-called weighing conveyor
  • the front portion i.e. that portion of the weighing conveyor in which the pendulously deposited wool mat is fed forward to subsequent conveyors taking it further to a tempering furnace, is suspended from weight sensing load sensors, which will thus sense the weight of the pendulously deposited wool mat only and be irrespec ⁇ tive of the own weight of the weighing conveyor.
  • the own weight of the whole weighing conveyor is appr. 400 kg and the weight of the wool mat maximally appr. 30 kg and minimally appr. 4 kg.
  • the load sensors have a maximum accuracy of 0,1 % and can in above cases be chosen for a measur ⁇ ing range of 0 to 40 kg, whereby the measuring accu- racy, even in connection with the lightest wool mat, will be ⁇ 1 % instead of ⁇ 10 %, if the whole weighing conveyor were supported by load sensors.
  • a deposited wool mat with constant surface weight is all the time fed onward so that the speed corresponds to the wool amount fed down on the weigh ⁇ ing conveyor from the swing tray, irrespective of • variations in the surface weight of the primary mat coming from the suspended swing tray conveyor.
  • the load sensors will sense within one second in above cases that the pendulously deposited wool mat has become 15 % too light and can give a signal for stop ⁇ ping the weighing conveyor so that no greater distur ⁇ fleecee arises in the surface weight of the pendulously deposited wool mat.
  • the weighing conveyor can be run up to the correct speed quickly, when the load sensors sense that the weight corresponds to the surface weight adjusted.
  • the method of weighing the wool mat directly under the swing tray on the weighing conveyor allows to compensate for a change in the volume weight of the primary wool mat while the secondary wool mat is formed, whereby the variations in the volume weight thereof can be kept within very narrow tolerances.
  • the drawing shows a lateral view of the lower end of a suspended swing tray conveyor of the produc ⁇ tion line and the subsequent receiving conveyor.
  • the suspended swing tray conveyor is designat ⁇ ed 2 in the drawing.
  • the receiving conveyor comprises a weighing conveyor 1 positioned substantially below the suspended swing tray conveyor 2, a battery 7 of wheels and a subsequent line conveyor 8.
  • the middle line of the swing motion is designated 2a and the end lines of the motion, i.e. edges of the primary wool mat, 2b.
  • the weighing conveyor is suspended from a cross-formed spring 3 behind the middle line 2a of the swing motion on both sides of the conveyor in such a way that it is almost fully balanced mechani ⁇ cally.
  • load sensors 4 positioned between the cross spring 3 and the outlet end of the conveyor, preferably one of these sensors also positioned on each side, shall only sense a tare load of appr.
  • the weighing electronics gives a control signal to a regulator, which is not shown in the drawing, but controls the speed of a motor 5 driving the weighing conveyor so that the weight of the depo ⁇ sited wool mat, sensed by the load sensors 4 along the distance between the cross spring 3 and the end wheel of the weighing conveyor at the transition to the subsequent battery 7 of wheels, is kept constant all the time.
  • the load sensors 4 are preferably posi ⁇ tioned at least substantially at the place where the secondary wool mat 6 has reached its final thickness, thus preferably at or at the end of the weighing con- veyor 1, before the battery 7 of wheels. However, it is also possible to carry out the weighing earlier.
  • the subsequent line conveyor 8 and the battery 7 of wheels are driven by a separate motor synchronously with the motor 5 driving the weighing conveyor 1.
  • the motor 5 is attached to the frame of the weighing con ⁇ veyor 1.
  • the frame 9 to which the cross spring and the load sensor means are fastened is kept at a con ⁇ stant height by a support 10 at the end which is sit- uated closer to the suspended swing tray conveyor, while a device 11, e.g. a hydraulic cylinder, can lift or lower the other end of the frame 9, which also supports the battery 7 of wheels and one end of the subsequent line conveyor 8.
  • the drawing shows the weighing conveyor in its lowest adjustment position, i.e. adjusted for the slowest speed and the highest surface weight of the pendulously deposited wool mat 6.
  • the inclination of the frame 9 is adjusted by means of the device 11 so that the upper surface of the pendulously deposited wool mat 6 is parallel to the lower edge 12 of the suspended swing tray con ⁇ veyor 2.
  • the pendulously deposited wool mat 6 will be about 80 cm thick in the lowest adjustment position shown in Figure 1 and about 15 cm in the highest ad- justment position, by means of which adjustment the weighing conveyor 1 moves at its highest speed.

Abstract

L'objet de l'invention est d'obtenir un tapis de laine minérale d'un poids par unité de surface aussi constant que possible. La laine minérale est produite sur une chaîne dans laquelle un mélange minéral transformé en fibres est collecté de façon à former un mince tapis de laine primaire sur une bande transporteuse. Ladite bande transporteuse conduit à une bande transporteuse à plateau orientable suspendu (2) déposant le tapis de laine primaire sur une bande transporteuse réceptrice de façon à former un deuxième tapis de laine comportant plusieurs couches. L'objectif est atteint par utilisation sur la bande transporteuse réceptrice (1) d'un moyen (4) permettant de peser le poids par unité de surface du tapis de laine secondaire (6) formé sur la bande transporteuse réceptrice (1) et par raccordement, par l'intermédiaire d'un régulateur, du moyen de pesée (4) à un moteur d'entraînement (5) de la bande transporteuse réceptrice (1), lequel régulateur permet de réguler la vitesse du moteur.The object of the invention is to obtain a carpet of mineral wool with a weight per unit area as constant as possible. Mineral wool is produced on a chain in which a mineral mixture transformed into fibers is collected so as to form a thin carpet of primary wool on a conveyor belt. Said conveyor belt leads to a conveyor belt with a suspended orientable plate (2) depositing the primary wool carpet on a receiving conveyor belt so as to form a second wool carpet comprising several layers. The objective is achieved by using a means (4) on the receiving conveyor belt (1) for weighing the weight per unit area of the secondary wool carpet (6) formed on the receiving conveyor belt (1) and by connection, via a regulator, of the weighing means (4) to a drive motor (5) of the receiving conveyor belt (1), which regulator makes it possible to regulate the speed of the motor.

Description

A device in a mineral wool production line
The present invention relates to a device in a mineral wool production line, in which production
'V 5 line a mineral melt converted into fibres is collect¬ ed so as to form a thin primary wool mat on a convey¬ or, which leads to a suspended swing tray conveyor depositing the primary wool mat on a receiving con¬ veyor so as to form a secondary wool mat comprising 10 several layers.
In the manufacture of mineral wool, a mineral melt is converted into fibres by means of a spinning machine provided with a blow-off blowing the fibres formed into a fibre collecting chamber, while unde- 15 fibrated solidified small melt particles, called beads, are separated from the fibre. The formed fibre is collected on a conveyor so as to form a thin fibre mat, called primary wool mat, which is transported further to a suspended swing tray conveyor depositing 20 it on a slow moving receiving conveyor. Through this is formed a secondary wool mat comprising many lay¬ ers.
The intention of pendulous deposition is to re¬ duce the variations in volume weight of the secondary 25 wool mat in order to provide an even wool distribu¬ tion across the breadth of the whole production line.
The primary wool mat with a surface weight of 200 to 400 g per m2 is deposited pendulously so as to form a secondary wool mat having usually at least six 30 layers on a receiving conveyor, which moves at a 90° angle towards the arriving wool mat and runs at syn¬ chronous speed with the subsequent line.
In connection with a given product thickness, the volume weight or the surface weight is one of the
35 most important quality parameters to be kept within certain given limits at the manufacture.
On account of the variations in the melt flow to the spinning machine, the fibre production varies per time unit and thus also the surface weight of the primary mat.
The speed of the receiving conveyor is control¬ led in order to compensate for these variations in the primary mat, for which compensation have been used different measuring signals, such as power con- sumption of the spinning machine, underpressure in the wool collecting chamber etc., in order to obtain an early indication of changes in the momentary vol¬ ume of the fibre production per time unit. These aux¬ iliary signals are not absolute and there is no sta- ble connection between these signals and the fibre production.
Attempts have been made to weigh the primary wool mat, but owing to the low surface weight and the high speed of the primary mat, a weighing accuracy better than ±5 % cannot be reached, and therefore it is not possible to control the speed of the receiving conveyor in such a way that an appreciably better accuracy of the surface weight of the pendulously de¬ posited wool mat would be reached than when weighing the primary wool mat.
Another known method is to weigh the pendulous¬ ly ready-deposited secondary wool mat and to regulate the speed of the receiving conveyor by means of pre¬ viously mentioned auxiliary signals, which are cor- rected by means of the surface weight signal from the pendulously deposited wool.
A subsequent weighing of the deposited wool mat has a rather long time delay, till it can give a cor¬ rection signal to a surface weight regulator, whereby several metres of deposited wool mat can have an in- correct surface weight. Normally it is expected that a surface weight accuracy of ±3-4 % can be reached by above regulating methods.
Moreover, for starting and stopping the fibre production or the primary wool mat, a sophisticated computer programme is required so as to calculate when the primary wool mat is deposited on the receiv¬ ing conveyor so that this can start and stop at the correct moment to avoid a too big accumulation of wool or an idle running of the receiving conveyor.
The object of the invention is to provide a new device, by means of which above drawbacks can be avoided and a higher accuracy of the surface weight of the pendulously deposited secondary wool mat can be achieved.
The device according to the invention is mainly characterized in that the receiving conveyor com¬ prises a portion positioned substantially below the suspended swing tray conveyor and provided with means for weighing the surface weight of the secondary wool mat formed on said portion and that the weighing means are connected through a regulator to a driving motor of said portion in order to control its speed in such a way that, in spite of variations in the surface weight of the primary wool mat, a secondary wool mat with an accurately constant surface weight is obtained.
The speed of the portion of the receiving con¬ veyor weighing according to the invention can be reg- ulated in such a way that the surface weight of the pendulously deposited wool mat is all the time kept constant on an adjusted level with an accuracy better than ±1 %.
According to a preferred embodiment of the in- vention, the weighing portion of the receiving con- veyor, i.e. the so-called weighing conveyor, is in a mechanically balanced way suspended from below the suspended swing tray conveyor so that the point of suspension will be on the rear side of the middle line of the suspended swing tray conveyor. The front portion, i.e. that portion of the weighing conveyor in which the pendulously deposited wool mat is fed forward to subsequent conveyors taking it further to a tempering furnace, is suspended from weight sensing load sensors, which will thus sense the weight of the pendulously deposited wool mat only and be irrespec¬ tive of the own weight of the weighing conveyor.
In the construction suggested, the own weight of the whole weighing conveyor is appr. 400 kg and the weight of the wool mat maximally appr. 30 kg and minimally appr. 4 kg.
The load sensors have a maximum accuracy of 0,1 % and can in above cases be chosen for a measur¬ ing range of 0 to 40 kg, whereby the measuring accu- racy, even in connection with the lightest wool mat, will be ±1 % instead of ±10 %, if the whole weighing conveyor were supported by load sensors.
By regulating the speed of the weighing con¬ veyor in such a way that the weight is kept constant thereon, a deposited wool mat with constant surface weight is all the time fed onward so that the speed corresponds to the wool amount fed down on the weigh¬ ing conveyor from the swing tray, irrespective of • variations in the surface weight of the primary mat coming from the suspended swing tray conveyor.
With the lowest surface weight of about 2 kg per m2 of the pendulously deposited wool, mat, exposing the load sensors to a weight of about 4 kg, the weighing conveyor and the subsequent conveyors move at a maximum speed of about 20 m/min or 0,33 m/s. A 10 % change in the surface weight, which is approxi¬ mately 300 g per m2 in the primary wool mat, is sensed by the load sensors in 1 second as an error of about 1,5 % and in 3 seconds as an error of about 5 % in order to come out in 6 seconds as an error of fully 10 % in the surface weight of the pendulously depos¬ ited wool, if the weighing conveyor has a constant speed.
By letting a regulator control the speed of the weighing conveyor immediately when the measuring sen- sors sense an error in the surface weight, in order to eliminate the error in the weight of the deposited wool mat, it is possible to control the speed by a simple PID regulator so that the variations in the surface weight are kept within ±1 %, within a length of 0,5 m of the pendulously deposited wool mat, which cannot be achieved by previously known and described methods.
If the primary wool mat comes to an end, the load sensors will sense within one second in above cases that the pendulously deposited wool mat has become 15 % too light and can give a signal for stop¬ ping the weighing conveyor so that no greater distur¬ bance arises in the surface weight of the pendulously deposited wool mat. When pendulous deposition of a primary wool mat starts again, the weighing conveyor can be run up to the correct speed quickly, when the load sensors sense that the weight corresponds to the surface weight adjusted. The method of weighing the wool mat directly under the swing tray on the weighing conveyor allows to compensate for a change in the volume weight of the primary wool mat while the secondary wool mat is formed, whereby the variations in the volume weight thereof can be kept within very narrow tolerances. A preferred embodiment shown schematically in the enclosed drawing will be described in greater detail in the following.
The drawing shows a lateral view of the lower end of a suspended swing tray conveyor of the produc¬ tion line and the subsequent receiving conveyor.
The suspended swing tray conveyor is designat¬ ed 2 in the drawing. The receiving conveyor comprises a weighing conveyor 1 positioned substantially below the suspended swing tray conveyor 2, a battery 7 of wheels and a subsequent line conveyor 8. The middle line of the swing motion is designated 2a and the end lines of the motion, i.e. edges of the primary wool mat, 2b. The weighing conveyor is suspended from a cross-formed spring 3 behind the middle line 2a of the swing motion on both sides of the conveyor in such a way that it is almost fully balanced mechani¬ cally. When the conveyor is empty, load sensors 4 positioned between the cross spring 3 and the outlet end of the conveyor, preferably one of these sensors also positioned on each side, shall only sense a tare load of appr. 20 % of the measuring range of the load sensors, which load is tared away in the weighing electronics. The weighing electronics gives a control signal to a regulator, which is not shown in the drawing, but controls the speed of a motor 5 driving the weighing conveyor so that the weight of the depo¬ sited wool mat, sensed by the load sensors 4 along the distance between the cross spring 3 and the end wheel of the weighing conveyor at the transition to the subsequent battery 7 of wheels, is kept constant all the time. The load sensors 4 are preferably posi¬ tioned at least substantially at the place where the secondary wool mat 6 has reached its final thickness, thus preferably at or at the end of the weighing con- veyor 1, before the battery 7 of wheels. However, it is also possible to carry out the weighing earlier. The subsequent line conveyor 8 and the battery 7 of wheels are driven by a separate motor synchronously with the motor 5 driving the weighing conveyor 1. The motor 5 is attached to the frame of the weighing con¬ veyor 1. The frame 9 to which the cross spring and the load sensor means are fastened is kept at a con¬ stant height by a support 10 at the end which is sit- uated closer to the suspended swing tray conveyor, while a device 11, e.g. a hydraulic cylinder, can lift or lower the other end of the frame 9, which also supports the battery 7 of wheels and one end of the subsequent line conveyor 8. The drawing shows the weighing conveyor in its lowest adjustment position, i.e. adjusted for the slowest speed and the highest surface weight of the pendulously deposited wool mat 6. The inclination of the frame 9 is adjusted by means of the device 11 so that the upper surface of the pendulously deposited wool mat 6 is parallel to the lower edge 12 of the suspended swing tray con¬ veyor 2. The pendulously deposited wool mat 6 will be about 80 cm thick in the lowest adjustment position shown in Figure 1 and about 15 cm in the highest ad- justment position, by means of which adjustment the weighing conveyor 1 moves at its highest speed.

Claims

Claims :
1. A device in a mineral wool production line, in which production line a mineral melt converted into fibres is collected so as to form a thin primary wool mat on a conveyor, which leads to a suspended swing tray conveyor (2) depositing the primary wool mat on a receiving conveyor so as to form a secondary wool mat comprising several layers, c h a r a c - t e r i z e d in that the receiving conveyor comprises a por¬ tion (1) positioned substantially below the suspended swing tray conveyor and provided with means (4) for weighing the surface weight of the secondary wool mat (6) formed on said portion (1) and that the weighing means (4) are connected through a regulator to a driving motor (5) of said portion (1) in order to control its speed in such a way that, in spite of variations in the surface weight of the primary wool mat, a secondary wool mat (6) with an accurately constant surface weight is obtained.
2. A device according to claim 1, c h a r ¬ a c t e r i z e d in that the weighing portion of the receiving conveyor consists of a weighing con¬ veyor (1), whereby the receiving conveyor further comprises a battery (7) of wheels and a subsequent line conveyor (8).
3. A device according to claim 1, c h a r - a c t e r i z e d in that the weighing means (4) are positioned at least substantially at the place where the secondary wool mat (6) has reached its final thickness.
4. A device according to claim 2 or 3, c h a r a c t e r i z e d in that the weighing means (4) are positioned substantially at or at the outlet end of the weighing conveyor (1).
5. A device according to any of the claims 2 to 4, c h a r a c t e r i z e d in that the weighing conveyor (1) is suspended in a mechanically balanced way, in order to minimize the effect of its own weight.
6. A device according to claim 5, c h a r¬ a c t e r i z e d in that cross springs (3) on each side of the weighing conveyor (1) form suspension devices.
7. A device according to claim 5 or 6, c h a r a c t e r i z e d in that the middle line (2a) of the swing motion of the suspended swing tray conveyor (2) lies between the suspension devices (3) of the weighing conveyor (1) and the outlet end of the weighing conveyor, preferably closer to the sus¬ pension devices (3) than to the outlet end.
EP93900201A 1991-12-20 1992-12-18 A device in a mineral wool production line Ceased EP0617701A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI916087A FI90049C (en) 1991-12-20 1991-12-20 ANORDIN I EN PRODUKTIONSLINJE FOER MINERALULL
FI916087 1991-12-20
PCT/FI1992/000350 WO1993013026A1 (en) 1991-12-20 1992-12-18 A device in a mineral wool production line

Publications (1)

Publication Number Publication Date
EP0617701A1 true EP0617701A1 (en) 1994-10-05

Family

ID=8533720

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93900201A Ceased EP0617701A1 (en) 1991-12-20 1992-12-18 A device in a mineral wool production line

Country Status (4)

Country Link
EP (1) EP0617701A1 (en)
AU (1) AU3160693A (en)
FI (1) FI90049C (en)
WO (1) WO1993013026A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2883866B1 (en) * 2005-04-01 2007-05-18 Saint Gobain Isover Sa MINERAL WOOL, INSULATING PRODUCT AND PROCESS FOR PRODUCING THE SAME
FR2883865B1 (en) * 2005-04-01 2007-05-18 Saint Gobain Isover Sa MINERAL WOOL, INSULATING PRODUCT AND PROCESS FOR PRODUCING THE SAME

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI85688C (en) * 1990-06-13 1992-05-25 Partek Ab FOERFARANDE FOER ATT VID MINERALFIBERFRAMSTAELLNING REGLERA EN VIKTRELATERAD PARAMETER HOS EN MINERALFIBERBANA.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9313026A1 *

Also Published As

Publication number Publication date
WO1993013026A1 (en) 1993-07-08
FI90049B (en) 1993-09-15
AU3160693A (en) 1993-07-28
FI916087A (en) 1993-06-21
FI90049C (en) 1993-12-27
FI916087A0 (en) 1991-12-20

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