DE4432866C1 - Mineral wool fibre material prodn. in vertical layers - Google Patents

Abstract

To produce a length of mineral fibre material (29) with vertical fibre alignment, the mineral fibres (18) are sprayed with a bonding agent in a collection chamber (1) to be gathered by suction at a collecting gatherer (6) for onwards movement. The fibres are caught by the separate successive segments (8-11) of the carrier (6) through suction through their permeable surfaces, to be carried out of the collection chamber in segments, and then blown (15) clear of the transport system. The segment layers (19-21) of fibres are passed in succession to a conveyor belt (27), vertically to the belt movement direction. They are compressed into a material (29) by pressure (28) to the required thickness, to be passed to a kiln to set the bonding agent. Also claimed is an appts. with a carrier (6) of segments (8-11) which come into action in succession through the unit (6) rotation. The suction through the permeable segment surfaces collects fibres from the chamber (1) as a layer on each, applied by a suction chamber (12) within the unit (6). An internal blowing chamber (15) faces the segment (10) at the discharge position. A conveyor belt (27), below the blowing station (15), takes the ejected fibre layers vertically to the belt movement, in succession, to form a material (29) of vertical fibre segments. They are compressed (28) to the required thickness before passing to a kiln to set the bonding agent.

Description

The invention relates to a method for manufacturing position of a mineral fiber lamella web, the mineral fibers sprayed with binders in a collection chamber and under suction on an air permeable Means of transport are collected.

In the classic process of making a Mineral fiber lamella track is the means of transport in the form of an endless conveyor belt in the bottom area of the Collection chamber. A pile of fibers forms. At the It will discharge the pile from the collection chamber between endless conveyor belts presses, the fibers essentially in planes parallel to the large surfaces of the so formed Orient mineral fiber web. After reaching the The desired thickness is the mineral fiber web for curing the contained binder passed through a hardening furnace. After exiting the hardening furnace, the mineral fiber cut into strips or lamellas, the Cuts across or perpendicular to the longitudinal direction of the lamella lenbahn run. The individual slats are then turned around Rotated 90 ° around their axes and using a Glue glued together to form a lamella sheet.

In connection with this classic manufacturing First the technical background and the relationships for a better understanding of the invention explained.

Mineral wool insulation materials consist of a variety of Individual fibers that are used in the production, as I said Binders are impregnated. By pushing the big ones  The surface of the insulating membrane becomes natural Packing density changed. In the hardening furnace Structure by curing mostly organic binders or fixed by heating inorganic binders. The bulk density influences the mechanical, thermal or hygroscopic properties of the insulation. Because of the an elongated shape of the individual fibers exists characterized anisotropy of the insulation properties. At a parallel storage of the fibers to the large surfaces of mineral wool insulation is compressibility very large perpendicular to these surfaces, the pressure resistant speed is low and at the same time there is a low transverse tensile strength. The thermal conductivity of a such product, however, reaches a minimum, i.e. H. it the greatest thermal insulation results.

When the fibers are arranged perpendicular to the large upper areas, as with lamella tracks, increases with the same Bulk density and the pressure with the same proportion of binder strength considerable. But at the same time it increases Thermal conductivity, d. H. the thermal insulation takes something from. The pressure deformation curves of the insulation materials are also different different according to the orientation of the fibers. At paralle orientation of the fibers to the large surfaces it initially has a relatively high compression and with increasing compression to an increase in compressive stress. In this case, a breaking load cannot be clearly determined define. In the parallel to the printing direction Fibers, i.e. if the fibers run perpendicular to the large web surfaces is a comparatively high one Initial resistance available. Breaks after overuse but the load-bearing fiber structure came together almost suddenly.

The previously described anisotropic properties of the insulation fabrics are used in many different ways. The Lamellar mats are preferably used to insulate pipelines lines or other objects with curved surfaces.  

The lamellar mats exhibit when using glass wool Bulk densities of less than 30 kg / m³ and for rock wool products Bulk densities of less than 70 kg / m³. Because of the high Leave compressibility parallel to the carrier materials the lamellar mats on the curved surfaces of the objects to be insulated hang up. At the same time, a high compressive strength is in radial direction to the curved surfaces. In addition, there is a uniform outer surface of the Insulation layer.

Insulation materials, especially rock wool insulation materials with bulk densities greater than, for example, 100 kg / m³ will occur as solid Insulation used on flat roofs. With an orientation the fibers parallel to the large surfaces become Achievement of the tread resistance in the order of 30 to 50 percent more fibers are required in this way to achieve the same compressive strength. The single ones Lamellar membranes are usually used on bitumen roofing membranes glued. You can also use a relatively thin, pressure-compensating mineral wool top layer can be glued. The cross section of the sheets or plates can be rectangular or be trapezoidal in order to e.g. B. a slope on one To produce a flat roof.

Slat strips can also be used as a plaster base on the outside glue on outer walls of corner buildings and with one provide reinforced plaster. Even with bulk densities of over 90 kg / m³ such plates can still be curved Surfaces, but with a correspondingly large curvature radius, adjust. Lamellar webs with low bulk density are usually glued on paper or cardboard and serve as plaster supports in interior fittings.

A wide range of applications for mineral wool insulation materials consists in the insulation of wooden structures, e.g. B. from Roofs as well as exterior and interior wall constructions.  

Here, the insulation material should adjoin the contours of the adjust the wood closely to create joints and thus thermal bridges avoid. At the same time, the insulation must bend in itself be stiff that he z. B. not from the rafters falls out. With the usual orientation of the fibers parallel to the large web surfaces, however, is precisely that highest compressive strength parallel to the large surfaces achieved so that especially with larger insulation thicknesses and appropriately deformed wood it does not become enough appropriate joint closure comes. Through a targeted overload the edge areas of such plates can here Compressibility can be increased. The destruction of the structure however, in most cases, causes the edges to soften or delaminate. In both cases there is none sufficient tight fit to ensure more.

The size of the dimensions of the lamellar webs, in particular its width is determined by the usual width of the hardening furnace narrowly limited. Since the insulation thicknesses are usually less than 20 up to 30 cm, is also the clear height of the hardening furnace limited accordingly in practice. Multiple slats sheets could be glued together to form a plate, but that represents a complex manufacturing process. When using organic glue this can do so much combustible substance that the insulation material the desired property of non-combustibility, e.g. B. according to DIN 4102 part 1. The adhesive layer can also the elasticity and diffusibility of the insulation affect the material in the area of the layer.

The above should highlight the difficulties show that in the classic manufacturing process and when choosing the respective mineral fiber products arise.

There are more from the state of the art in printed form Devices or methods and devices for the manufacture development of fiber lamellar webs known. So is from the AT 195 746 a device for producing composite bodies made of fiber material animal, vegetable or synthetic origin as known. At this device, the fiber material from an in essential vertical shaft by means of a conveyor direction of a rotating hacking roller in the the fiber material is loosened. From this hackle roller The fiber material essentially enters in tufts horizontal position one after the other in passing subjects a rotating fan roller, from which the fiber tufts after a quarter turn of the fan roller on Conveyor belt are stored. The fibers within the individual tufts of fibers or stacks of fibers then run in essentially in the vertical direction, d. H. perpendicular to the large surfaces of the fiber web thus formed. Then the fibrous web or the fleece is one Nozzle with a binder, e.g. B. with rubber milk sprayed and then vulcanized.

Another method and apparatus for manufacturing with a slat product made from mineral wool the hardening is known from DE-OS 23 07 577. Here is proceeded so that initially a mineral wool web is produced in which the fibers essentially run parallel to the large web surfaces. The train is then cut in the longitudinal direction by vertical cuts Cut longitudinal strips, which are then cut using Endless conveyor belts at 90 ° around the longitudinal axes of the strips rotated and then merged back into a lane be added. In this way, lamellar webs emerge longitudinal slats in which the fibers essentially lichen perpendicular to the large web surfaces.

After the strips or slats have been joined together, the Web for curing the binder through a hardening furnace guided.

Finally, DE 38 32 773 A1 describes a method and a device for the production of mineral fiber boards known, in which case a fiber web is first produced in which the fibers are substantially parallel to the large web surfaces. With the help of speed The roller is controlled by numerous rollers Longitudinally compressed, so that the previously gradually compressed web takes wave form. in the The end product is the longitudinal waves of the web squeezed that the fibers within the web for the most part perpendicular to the large web surfaces run, but in the area of the two-sided web surface Chen form fiber arches.

Another way is therefore taken in the invention, namely, the invention is based on the object  Process for producing a mineral fiber lamella web create which with little effort and little Binder consumption particularly favorable strength to produce properties of the end product.

The object is achieved according to the invention in that that the mineral fibers on individual successive Segments of the means of transport collected and outside the Collection chamber blown off in segments from the means of transport sen that the segments thus formed, lamellae shaped mineral wool layers one after the other a conveyor band be abandoned in such a way that the mineral fibers in the essentially perpendicular to the plane of movement of the conveyor bandes run, and that the lamellar mineral layers of wool on the conveyor belt to a lamella web assembled by pressing to a desired thickness of the Lamellar web brought and then to harden the Binder can be fed to a hardening furnace.

In this way, the manufacture of the individual slats significantly simplified, and there is the advantage that the upper and lower surfaces of the slats initially completely are irregular. Only by squeezing the Lamellar web to the desired thickness becomes a flat surface of the lamellar path. The result is Advantage that the fiber course in planes perpendicular to the large surfaces in the central area of the lamella web largely maintained, but in both side surface areas of the lamella web a ver felting of the fibers is achieved because the binder this process step is not yet cured and the fibers can be easily bent and bent. To passing through the hardening furnace in this way a mineral fiber lamella sheet with particularly favorable Strength properties, especially pressure-bending and Tensile properties created.  

The manufacture of the mineral fiber lamella is thereby ver simply that the slats blown off the segments shaped mineral wool layers on one essentially vertically running conveyor belt.

The invention also relates to a device for through implementation of the previously specified process, thereby is characterized in that the means of transport is endless composed of a number of air-permeable segments is that at least a portion of each in the collection segments located a suction chamber and a segment located outside the collection chamber a blow-off chamber are assigned, and that below the Blow-off chamber a conveyor belt is arranged such that the blown off lamellar mineral wool layers with a fiber course essentially perpendicular to the plane of movement of the conveyor belt on this one at a time Lamellar track collected by another above the Conveyor belt arranged on the desired slat Brought thickness and the lamella web to harden the Binder is passed through a hardening furnace.

Advantageous embodiments of the invention direction result from the subclaims.

In the drawing, embodiments of the invention are in Scheme shown, namely show

Fig. 1 is a schematic representation of an apparatus in side view,

Fig. 2 is a schematic illustration of another apparatus, also in side view,

Fig. 3 is an end view of a drum and

Fig. 4 is an end view of a drum in another embodiment.

Simplified Fig. 1 shows a collection chamber 1 having a top wall 2 and a ceiling, further comprising an end wall and a bottom 4. In the region of an opening 5 in the end wall of the collecting chamber, a drum 6 is rotatably mounted on a drum axis 7 in the direction of the arrow. The drum represents the endless and rotating means of transport and consists of a number of air-permeable segments 8 , 9 , 10 and 11 . As shown in FIG. 2, the drum rotating about the horizontal axis 7 is advantageously arranged in the upper and / or lateral exit area of the collecting chamber 1 . At least some of the segments located in the collection chamber 1 are assigned a suction chamber 12 and a segment 10 located outside the collection chamber, a blow-off chamber 15 . The suction chamber 12 and the blow-off chamber 15 are delimited by fixed, essentially radially extending walls 13 , 14 or 16 , 17 and by drum end walls, not shown.

The mineral fiber stream 18 produced by a conventional defibration unit and sprayed with binder is sucked in by the suction chamber, so that 6 mineral wool layers 19 , 20 , 21 accumulate on the segments of the drum, a fiber course resulting essentially parallel to the segment planes. By rotating the drum 6 , the mineral wool layers 19 to 21 are brought one after the other into the area of the blow-off chamber 15 , and they are blown off from this blow-off chamber. Below the blow-off chamber 15 , a conveyor belt 27 is arranged in such a way that the abge blown lamellar mineral wool layers 21 with a fiber course substantially perpendicular to the plane of movement of the conveyor belt 27 are collected one after the other to form a lamella web 29 . In order to facilitate the downward movement of the mineral wool layer 21 in the direction of the conveyor belt 27 , the blow-off chamber 15 is arranged at a distance from one another, a substantially vertically running air-permeable conveyor belt 22 with a suction chamber 24 . After blowing off the blow-off chamber 15 , the mineral wool layer 21 is thus initially taken over by the vertical conveyor belt 22 and conveyed in the direction of arrow 23 in a targeted manner downwards. As illustrated in FIG. 1, the individual lamellae that meet the conveyor belt 27 result in a fiber course as is present in a desired lamellae web.

Below the blow-off chamber 15 and outside the drum 6 , at least one light plate 25 is advantageously arranged for guiding the mineral wool layers 21 or 26 discharged downward from the vertical conveyor belt 22 onto the lower conveyor belt 27 . Suitable guide rollers can also be provided instead of the guide plate 25 . Above the conveyor belt 27 , another conveyor belt 28 is easily seen, so that between these two conveyor belts 27 , 28 with appropriate control of the speeds from the individual mineral wool layers, a lamella web 29 is formed. Between the two conveyor belts 27 and 28 , the lamellar web is brought to the desired thickness, for. B. by a corresponding inclination of the upper conveyor belt 28 in the conveying direction, and further conveyor belts with a corresponding inclination or a reduced distance from one another can connect to the two conveyor belts 27 and 28 . The effect of the conveyor belts results in flat upper surfaces of the lamella web 29 with the felting of the fibers already explained above in the region of the large surfaces on both sides. In the lamella web 29 thus formed, the binder contained has not yet hardened. The lamella web 29 is then subsequently guided through a conventional hardening furnace, not shown, to harden the binder.

In the illustrated embodiment in Fig. 1, the drum 6 has a polygonal cross section, so that the segments 8 , 9 , 10 and 11 are formed out substantially flat. Appropriately, axially parallel air-impermeable strips are provided between the segments, so that the mineral wool layers 19 , 20 and 21 often forming in individual segments cannot be connected to one another or can be easily detached from one another. An alternative construction is that the drum is cylindrical and the air-permeable segments are separated from one another by axially parallel air-impermeable strips on the drum circumference. Some curved mineral wool layers are then formed in accordance with the cylindrical drum circumference, which layers can be used in the formation of a corresponding lamella web.

It should also be noted that the suction chamber 12 and the blow-off chamber 15 are advantageously arranged fixedly inside the drum 6 . The possibly required seals are not shown in detail.

As shown in FIG. 1, the blow-off chamber 15 is advantageously arranged in such a way that the air blow-out surface in the position of the segment 10 runs essentially vertically and the mineral wool layers 21 are blown off in a vertical position.

Fig. 2 shows a further embodiment of an inventive device. In this case, the transport medium has an endless, air-permeable conveyor belt 40 , which is deflected around two drums 34 and 35 arranged at a distance from one another with horizontal axes of rotation. The conveyor belt is divided into articulated, flat segments 43 . The drums 34 and 35 are polygonal in cross-section corresponding to the segments 43 . In this embodiment, the suction chamber 36 in the collecting chamber-side drum 34 is net angeord. The blow-off chamber 37 , on the other hand, is arranged in the drum 35 , which is located outside the simplified collecting chamber 30 . In simple terms, the collecting chamber 30 in turn has an upper wall 31 and an end wall 32 and an opening 33 for the arrangement of the means of transport. Advantageously, the transport band 40 in the opening 33 of the upper wall 31 and the output end wall 32 of the collecting chamber is arranged such that the axes of the drums 34 and 35 are approximately at the level of the upper collecting chamber wall 31 and the discharge end of the conveyor belt with the Project drum 35 out of the collection chamber. In this embodiment example, the suction chamber 36 has boundary walls 38 and the blow-off chamber 37 approximately box-shaped boundary walls 39th

An advantageous embodiment consists in that at least one further suction chamber 44 is arranged fixedly above the lower run 42 of the conveyor belt 40 and in the area between the two drums 34 and 35 . For reasons of space or to simplify construction, the further suction chamber 44 is divided into a plurality of chamber sections 45 or individual chambers. The length of the chamber sections 45 seen in the transport direction correspond approximately to the length of a conveyor belt segment 43 .

In this embodiment of the device according to the invention, the mineral fiber stream 46 is sucked in by the suction chamber 36 and the suction chamber 44 , so that mineral wool layers 47 are formed again on the individual segments, which first lead out of the collecting chamber in the area of the suction chamber 36 and then on the upper one Run 41 of the conveyor belt in the direction of arrow 49 to the blow-off chamber 37 . The blowing off of the individual mineral wool layers and the further formation of the lamella web takes place in the same way as has been explained for FIG. 1. Advantageously, the distance of the vertically extending conveyor belt 22 from the blow-off chamber 37 is variable or adjustable, as indicated by arrow 48 . This also applies to the conveyor belt 22 and the suction chamber 24 according to FIG. 1.

Depending on the given operating conditions, the means of transport, ie the drum 6 according to FIG. 1 or the conveyor belt 40 according to FIG. 2, can be driven either continuously or discontinuously in segments. Accordingly, the blow-off chambers 15 and 37 and the vertically running conveyor belt 22 with the suction chamber 24 can be operated either continuously or segment-wise discontinuously.

When considering the constructions according to FIGS. 1 and 2, the following should be emphasized.

In contrast to the known devices in which the mineral fiber flows collect in the bottom area of the collecting chamber on a conveyor belt, the mineral fiber flows 18 and 46 take a different course within the collecting chambers, in each case in the direction of the suction chambers. This has the advantage that any pearls or other solid pieces that are not defibrated can be released from the mineral fiber stream under the force of gravity and fall down under the force of gravity, which can then collect at the bottom of the collecting chamber and be cleared from here. In this simple way it is avoided that undesired lumpy components get into the lamella web to be formed from the outset.

The air-permeable surfaces of the above Segments that are used to collect the mineral fibers appropriately designed filter-like, d. H. you can with filter-like covers are provided, which is a safe Ensure that even the smallest fibers are collected.  

Fig. 3 shows a view of a drum 6 , wherein the individual segments 50 , 51 and 52 are rectangular on the entire circumference of the drum. These rectangular, air-permeable surfaces are expediently separated from one another by air-impermeable strips 53 and 54 , as already described above. When the drum moves in the direction of arrow 55 , rectangular mineral wool layers are blown off.

According to FIG. 4, the air-permeable surfaces 59 may be 60 and 61, also designed triangular or trapezoidal within the rectangular segments 56, 57 and 58. The remaining triangular surfaces 62 , 63 and 64 are then air-impermeable. With a corresponding direction of movement 65 of the drum, triangular or trapezoidal mineral wool layers are then formed and blown off at the respective blow-off chambers, so that trapezoidal or triangular lamellas formed on the conveyor belt 27 in cross section form the z. B. insulation can be used as sloping roof. For the production of such trapezoidal or triangular lamella tracks, the upper plate belts are pivotally mounted in the hardening furnace to adapt to the inclination of the triangular or trapezoidal mineral wool layers. It goes without saying that this also applies to the upper conveyor belt 28 .

Claims (23)

1. A method for producing a mineral fiber lamella web ( 29 ), wherein the mineral fibers ( 18 ) are sprayed with binders in a collecting chamber ( 1 ) and collected under suction on an air-permeable transport medium ( 6 ; 40 ), characterized in that the Mineral fibers on individual successive segments ( 8 , 9 , 10 , 11 ; 43 ) of the transport by means of ( 6 ; 40 ) collected and blown off segment by segment from the transport means outside the collecting chamber ( 15 ; 37 ), that the segmented, lamellar segments thus formed Mineral wool layers ( 19 , 20 , 21 ; 47 ) are successively given a conveyor belt ( 27 ) in such a way that the mineral fibers run essentially perpendicular to the plane of movement of the conveyor belt ( 27 ), and that the lamellar mineral wool layers on the conveyor belt ( 27 ) assembled into a lamella web ( 29 ), brought to a desired thickness of the lamella web by pressure ( 28 ) and connected can be fed to a hardening furnace to harden the binder. 2. The method according to claim 1, characterized in that the blown from the segments ( 10 ) lamellenförmi gene mineral wool layers ( 21 ) on a substantially vertical conveyor belt ( 22 ) are sucked ( 24 ). 3. Device for carrying out the method according to claim 1 or 2, characterized in that the transport means ( 6 ; 40 ) is continuously composed of a number of air-permeable segments ( 8 , 9 , 10 , 11 ; 43 ) that at least a part of each in the collection chamber segments located (1) a suction chamber (12; 36) and a respectively located outside the collection chamber segment (10) has a blow-off chamber (15; 37) are associated, and that below the blow-off chamber (15; 37) a conveyor belt (27 is arranged in such a way that the blown-off lamellar mineral wool layers ( 21 ) with a fiber run essentially perpendicular to the plane of movement of the conveyor belt ( 27 ) thereon in succession to form a lamella track ( 29 ), by a further conveyor belt arranged above the lamella track ( 29 ) 28 ) brought to the desired thickness and the lamella web ( 29 ) for curing the binder by a hardening furnace leads. 4. The device according to claim 3, characterized in that the blow-off chamber ( 15 ; 37 ) is arranged at a distance from each other a substantially vertically extending air-permeable conveyor belt ( 22 ) with a suction chamber ( 24 ). 5. Apparatus according to claim 3 or 4, characterized in that the transport means comprises a drum ( 6 ) rotating about a horizontal axis ( 7 ), the circumference of which is divided into segments ( 8 , 9 , 10 , 11 ) and that Drum ( 6 ) is arranged in the upper and / or lateral exit area of the collecting chamber ( 1 ). 6. The device according to claim 5, characterized in that the suction chamber ( 12 ) and the blow-off chamber ( 15 ) by fixed, substantially radially extending walls ( 13 , 14 ; 16 , 17 ) and by drum end walls are limited. 7. The device according to claim 5 or 6, characterized in that the drum ( 6 ) has a polygonal cross section, the segments ( 8 , 9 , 10 , 11 ; 50 , 51 , 52 ) are formed substantially flat and between the segments Axially parallel air-impermeable strips ( 53 , 54 ) are provided. 8. Apparatus according to claim 5 or 6, characterized in that the drum is cylindrical and the air-permeable segments by axially parallel air-impermeable strips ( 53 , 54 ) on the drum circumference are separated from each other. 9. Device according to one of claims 3 to 8, characterized in that below the blow-off chamber ( 15 ) and outside the means of transport ( 6 ; 40 ) at least one guide plate ( 25 ) or guide rollers for guiding the mineral wool layers discharged downwards from the vertical conveyor belt ( 21 , 26 ) on the lower conveyor belt ( 27 ) are arranged. 10. Device according to one of claims 3 to 9, characterized in that the suction chamber ( 12 ) and the blow-off chamber ( 15 ) are arranged fixed within the transport means ( 6 ). 11. The device according to claim 10, characterized in that the blow-off chamber ( 15 ) is arranged such that the air blow-out surface ( 10 ) extends substantially vertically and the mineral wool layers ( 21 ) are blown off in a vertical position. 12. The apparatus according to claim 3, characterized in that the transport means has an endless, air-permeable conveyor belt ( 40 ) which is deflected about two drums ( 34 , 35 ) arranged at a distance from one another with horizontal axes of rotation and which in articulated, flat segments ( 43 ) is divided, and that the drums ( 34 , 35 ) are designed in accordance with the segments ( 43 ) in cross section polygonal. 13. The apparatus according to claim 12, characterized in that the suction chamber ( 36 ) in the collecting chamber-side drum ( 34 ) and the blow-off chamber ( 37 ) in the outside of the collecting chamber ( 30 ) located drum ( 35 ) are arranged. 14. The apparatus according to claim 12 or 13, characterized in that the conveyor belt ( 40 ) in an opening ( 33 ) of the upper wall ( 31 ) and the output side end wall ( 32 ) of the collecting chamber is arranged such that the axes of the drums ( 34 , 35 ) are located approximately at the level of the upper collecting chamber wall ( 31 ) and the discharge-side end of the conveyor belt ( 40 ) with the drum ( 35 ) protrude from the collecting chamber ( 30 ). 15. The apparatus according to claim 14, characterized in that above the lower run ( 42 ) of the conveyor belt ( 40 ) in the region between the two drums ( 34 , 35 ) at least one further suction chamber ( 44 ) is arranged stationary. 16. The apparatus according to claim 15, characterized in that the further suction chamber ( 44 ) is divided into several chamber sections ( 45 ), the length of which in the direction of transport corresponds approximately to the length of a conveyor belt segment ( 43 ). 17. The device according to one of claims 3 to 16, characterized in that the transport means ( 6 ; 40 ) is driven either continuously or segmentally discontinuously. 18. Device according to one of claims 3 to 17, characterized characterized in that the air-permeable surfaces of the  Segments for collecting the mineral fibers like filters are designed. 19. The apparatus according to claim 18, characterized in that the air-permeable surfaces of the segments ( 50 , 51 , 52 ) are rectangular. 20. The apparatus according to claim 18, characterized in that the air-permeable surfaces ( 59 , 60 , 61 ) of the segments ( 56 , 57 , 58 ) are triangular or trapezoidal, so that triangular or trapezoidal mineral wool layers are formed. 21. The apparatus according to claim 18, characterized in that the upper plate belts of the hardening furnace for Adapt to the slope of the triangular or trapezoid shaped mineral wool layers pivoted are. 22. Device according to one of claims 3 to 21, characterized in that the blow-off chamber ( 15 ; 37 ) and the vertically running conveyor belt ( 22 ) with the suction chamber ( 24 ) are operated either continuously or in segments, discontinuously. 23. Device according to one of claims 4 to 22, characterized in that the distance of the vertically extending conveyor belt ( 22 ) from the blow-off chamber ( 15 ; 37 ) is variable or adjustable ( 48 ).