DE10020333A1 - Production of insulating plates, especially lamella plates, used for insulating building facades comprises subjecting the surface of a mineral fiber strip to an air, vapor and/or water - Google Patents

Abstract

Production of insulating plates, especially lamella plates, comprises subjecting the surface of a mineral fiber strip to an air, vapor and/or water jet which conveys loose and/or weakly bound mineral fibers. An independent claim is also included for a device for producing insulating plates comprising an apparatus (5) for supplying an adhesion layer (6) to the mineral fiber strip and/or the lamella plates (2). The apparatus is arranged above a conveyor (4). Preferred Features: Glass pearls and/or sand are added to the air, vapor and/or water jet. -

Description

The invention relates to a method for producing insulation boards, in particular special slat plates, made of mineral fibers, preferably rock wool, at a silicate melt is defibrated in a defibration device, then the mineral fibers, if necessary with the addition of a binding agent and / or impregnation agent, on a conveyor as mineral fiber web are deposited, the mineral fiber web is then shaped and finally fed to a hardening furnace before the mineral fiber web in individual insulation boards is divided, lo in a further step and / or weakly bound and / or mineral fibers disturbed in their position of at least a large surface of the mineral fiber web and / or the Insulation boards are removed. The invention further relates to a device for Production of insulation boards, in particular lamella boards, from mineral fa star, preferably made of rock wool, with a fiberizing device in which a silicate melt is defibrated into mineral fibers, a conveyor on which the mineral fibers, if necessary with the addition of a binding and / or impregnation agents are deposited as a mineral fiber web, Bear beitungseinrichtung, for example cutting devices in which the Mi Machined general fiber web and, for example, in slat panels is converted, as well as a hardening furnace. The invention further relates to a Coating for a mineral fiber web, especially for lamellar plates, the following removal of loose and / or weakly bound and / or mineral fibers disturbed in their position by at least one large one Surface of the mineral fiber web and / or the lamella plates after the The method described above can be applied to the large surface.

For the production of insulation boards, methods are provided in which in egg a furnace, a silicate melt made of silicate material, for example Glasses, natural or artificial stones. The melt is fed to a defibration device, which is in front of or in a collection chamber  is arranged. With this fiberizing device, the melt becomes microfine Fibers frayed, which then in the collection chamber with binding and / or Impregnation agents are wetted before the mineral fa on a conveyor, usually a conveyor belt to a mine ralfaserbahn be collected. This mineral fiber web is then shaped machined, that is, for example, after the binder has hardened trimmed, folded and / or compressed at their edges. After the ge desired shape of the mineral fiber web is achieved, the mineral fiber web fed to a hardening furnace in which the binder cured and the Mineral fiber web is fixed in its shape.

Such insulation boards are used, for example, for the insulation of buildings façades used. In particular, such insulation panels come in such a way mentioned thermal insulation composite systems for use, in which the Insulation boards, in particular insulation boards designed as lamella boards the building facade using a building adhesive, usually an adhesive mortar be stuck on. To process such insulation boards on the Au Simplify the exterior facade of a building or cost-effectively ger it is known from the prior art to design the insulation boards in the factory with a pre-coating of an adhesive mortar or Form plastic dispersion. Such insulation boards are for example known from EP 0 719 365 B1. This pre-coating is meant to adhere the insulation boards on the insulation boards or the facade improve applied adhesive mortar. At the same time, such a loading layering also improves the adhesive effect of a final improve the worn cleaning system.

Another coating of a facade or roof cover made of mineral fibers is known for example from DE 32 48 663 C1. The one from this Publication previously known coating is based on silica sol and penetrates as water-based coating material to form an impregnation layer at least largely in the near-surface areas of the  Insulation board made of mineral fibers. The coating composition is in a ge wanted consistency under considerable pressure in the surface of the mineral fiberboard pressed in. In the surface areas of the mineral fiber This creates broken mineral fibers.

Furthermore, from EP 0 590 098 B1 a mineral wool molded body for heat and sound insulation of building exterior walls is known, which is intended for fastening to the exterior wall of the building on the one hand and as a plaster base for receiving an exterior plaster on the other hand and which has a bulk density of about 100 kg / m ³ to 150 kg / m ³ and an open porosity of about 87% by volume to 96% by volume, with a microfine, water-treated cement with an average grain size of about 2 µm to 3 µm, the is smaller than the average pore size between the mineral fibers and is incorporated in at least one molded surface layer with a small proportion of less than 0.5% by mass of surfactants.

The last-mentioned mineral wool molded body is particularly suitable for use suitable in composite thermal insulation systems.

Thermal insulation composite systems therefore consist of insulation layers that glued to the load-bearing walls or ceilings of buildings and with plaster layers protected against the effects of weather and mechanical loads and be designed optically. The insulation boards are glued this way probably all over as well as partial. Partial bonding is due to the the most economical application method with little material. This one used and common adhesive mortar becomes the processing site by machine promoted and in the form of beads and chunks (punctiform) on the load-bearing Surfaces applied. Then the insulation boards are usually in Bandage glued to the wall or ceiling.

The plaster to be applied to the glued-on insulation panels consists of the right gel from a base and a top coat. The basic plaster is mostly iden  table with the adhesive mortar. For thin-layer systems of approx. 3 to 4 mm is the base plaster from the Be on the individual scaffolding layers removed and applied to the insulation boards with a trowel. With thick-layer mineral plaster systems, the mass can be like the adhesive mortar mechanically conveyed and applied in beads.

As a rule, an alkali-resistant coated glass fiber Mesh fabric embedded. The grid fabric should be centered in the bottom Plaster layer arranged or at least completely embedded in it. The subsequently applied top coat serves to protect the base coat and enables the production of the desired optical effect.

Thermal insulation composite systems are based on the load cases of wind suction and dead weight designed. The stability of a thermal insulation composite system depends on to a high degree from the transverse tensile strength of the insulation boards and the adhesive strength in the interfaces between the insulation boards and the adhesive mortar and the insulation boards and the base plaster. The internal strength of ver Applied adhesive mortar and plaster layers are generally much higher ago, than the internal strength of the insulation boards made of mineral fa ser. This also applies to the bond between the adhesive mortar and the tra area of the building.

With high wind suction loads and high dead loads or low cross tensile strengths of the insulation boards are therefore supplementary secured by insulation holder. Such insulation holder consist in Usually from a plate and a shaft with a molded dowel. The plates can have different sizes. The dowel is replaced by a Screw spread, used as a cantilever in the calculation of the static system comes in. The number of insulation holders is also from the Posi tion within the thermal insulation composite system.  

In the case of insulating boards made of mineral fibers, the insulating boards are differentiated according to the course of the mineral fibers relative to the large surfaces of the insulating boards. On the one hand, insulation boards are known and suitable for use in thermal insulation composite systems that have a fiber course essentially parallel to their large surfaces. These insulation boards are made by collecting approx. 3.5 to 8.5 mass% of a thermosetting resin mixture as well as approx. 0.2 to 0.4 mass% oil or adequate amounts of oil-in-water -Emulsions impregnated mineral fibers produced on a continuously running belt. By appropriately compressing the fibers in the longitudinal and vertical direction of the production process, the fibers are folded and brought to the large surfaces in a more or less steep position. As a result of this storage, the compressive stresses that can be reached and the transverse tensile strength of the insulation board, but also the thermal conductivity, increase. Since, as a result of the vertical compression, a not inconsiderable part of the fibers is oriented parallel to the large surfaces, these interfaces ultimately determine the maximum and the transverse tensile strength that determines the stability of the thermal insulation composite system. Although such insulation boards have bulk densities of approx. 130 to 180 kg / m ³ , the transverse tensile strengths are usually very clearly below approx. 30 kPa. Such insulation boards require a relatively high material use, which increases the sound insulation capacity of the thermal insulation composite system, but overall does not lead to an economically optimal solution.

In an alternative embodiment of the insulation panels it is provided that the Fibers are essentially perpendicular to the large surfaces. It These are so-called slat plates, which are inexpensive Alternative to the insulation boards described above with a paral lel to the large surfaces running grain.

The lamella boards are manufactured in such a way that insulation boards with flat-stored fibers can be cut into slices by vertical cuts. The thickness of the panes corresponds to the desired insulation thickness. With these  The individual fibers are now predominantly perpendicular to the disks large surfaces, i.e. the surfaces that are used when processing with Kle mortar and / or the plaster layer.

The orientation of the mineral fibers significantly increases the achievable transverse tensile strengths and compressive stresses. Since only a certain level of strength is required for thermal insulation composite systems, the bulk densities of the lamella panels can be reduced to approx. 75 to 105 kg / m ³ .

Lamellar plates are usually made from a primary material that consists of a maximum of 200 mm thick plates, the other dimensions of the raw material from the width of the production line and the dimensions of the downstream processing plant are dependent. A largely ver Lust-free production is possible, for example, if it is the primary material plates are taken transversely to the direction of production and this even according to the future length of the slat plates from that on the Production line of endlessly produced mineral fiber web can be cut to length. The large surfaces of the slat plates are therefore parallel to the original oriented production direction.

The width of the slat plates is identical to the height of the primary material. There the length of the sections separated from the raw material plates was virtually the same big can be selected, the insulation thickness is variable within wide limits. she is however increased by the increasing insulation thickness Limited shear stress. The slat plates are currently on the market with the dimensions 0.1 to 1.2 m length by 0.2 m width by 0.8 m thickness offered.

Slat plates can also be produced as large-format plates. So For example, a procedure is known in which the endless mineral fiber web in front of the hardening furnace is broken down into individual sections by 90 ° rotated and by an appropriate compression as well as by using the  existing adhesiveness of the not yet curing resin parts again an endless mineral fiber web. Because in the hardening furnace a 5 to 10% compression in the vertical direction occurs, the mine deflected in the area of the surfaces of this mineral fiber web and horizontally oriented. As already explained above, these border zones determine ultimately the inherent transverse tensile strength of the insulation boards. To be as high as possible here To get values, the flat-lying mineral fibers must be removed become.

An alternative approach to be in the manufacture of lamella plates is that as thin as possible a mineral fa called primary fleece servlies by an upward and downward pendulum movement to a endless mineral fiber web is formed, the final structure of which by the Curing of the binder is fixed in a hardening furnace. In the slings The mineral fibers of the primary fleece lie at flat angles to the large ones Surfaces. These flat-stored mineral fibers have to go back into the Areas of steep mineral fibers are removed to make high cross to achieve tensile strengths.

For use in composite thermal insulation systems have therefore Lamellar plates proved to be advantageous as the small format sections of the raw material plates were manufactured. Cutting the slat plates to length takes place because of the high working speed and the longer downtimes mostly with saws. Knife tapes or knife disks are because of rapid wear and low working speed or not rarely used. Surface layers can also be precisely, for example Remove with sanding belts or milling. Therefore, the parting surfaces a fundamental distinction is made between cutting and grinding surfaces.

The method described above for the production of lamellar plate However, these lead to later use in a heat dämm composite system basically to the same problems in the upper  surface condition of the lamella plates. These slat plates have näm Lich the lack of the fact that the surfaces have high proportions of cut and Contain dressing of loosened or already loosened mineral fibers. To In addition, a part of the chunks penetrates during cutting and / or grinding mineral fibers mechanically into the surface of the lamella plates. Through the subsequent transport and / or stacking of the slat plates the near-surface mineral fibers are also in the surfaces of the La pressed plates and thus oriented parallel to the surfaces. Derar Any loosened fibers reduce the adhesion between the adhesive mortar and the Insulation boards on the one hand and the plastering system and insulation boards on the other on the part of In order to remove the loose mineral fiber components, EP 0 719 365 B1 for example, before that the cut surfaces before applying the thin Layer of adhesive mortar should be blown dust-free.

Furthermore, all insulating materials made of mineral fibers contain more or less large eats quantities of mineral fibers that are not at all during their manufacture Binders have come into contact. These mineral fibers are deposited due to their flight characteristics in mostly thin layers on the original primary fleece and are used in the subsequent upsetting folded. The mineral fiber layers formed in this way prevent cross-linking Binding of the approximately 1 to 3 mm thin, solid mineral fiber laminates. The Binder-free mineral fibers can be clearly identified by the lack of color know. They fall through when the surface of the insulation material is touched the lack of internal strength. The proportion of non-bearing mineral fibers is usually between 20 and 30%. With unfavorable manufacturing conditions This proportion can increase to 40%. Such mineral fiber pro Products must then already be classified as unusable.

It should also be noted that the silicate melt is usually not can be completely converted into mineral fibers. With insulation materials Rock wool contains approx. 20 to 30% by mass of non-fibrous components Diameters of less than 0.060 mm in the mineral fiber mass without  further bond are embedded. Strengthening also have an effect exposed mineral fibers from recycling processes. The return of derar tiger recycled fibers, for example as waste in the packaging of slat plates or from defective production lots in such a way that such insulation materials together with the hardened bandage be smashed or ground. The surfaces of the in the Sam Mineral fiber flakes blown back in the chamber look like fine filament ter, so that subsequent recycling impregnation tion is not possible. The mineral fibers from recycling material are therefore in Form of flakes a few millimeters in size, without internal strength are. The proportion in the mineral fiber webs can be between 3 and 20 % By mass.

It follows from the above statements that lamella plates rela tiv inhomogeneous bodies, their internal binding forces are very different can be highly trained.

Overall, the surfaces of mineral fiber insulation boards are hydro phob. They are made by the usual hydraulic bandage medium-sized adhesive mortars and plasters despite the added top surface-active wetting and porosity agents only in a very thin Surface layer wetted. Add to that the water content in these Materials are kept low to achieve high internal strength. At the processing of such adhesive mortars and plasters at high outside temperatures The binders harden quickly and under the influence of wind, which Bund further weakens or the bond does not come about.

The bond between the wet adhesive and plaster layers is so weak at first that the adhesive and plaster layers can easily be removed from the insulation board ten can be lifted off, the surface of the adhesive and plaster layers are covered with a mineral fiber fur, which clearly indicates that the Adhesive and plaster layers are not anchored in the fiber mass of the insulation boards  is. This lack of anchoring is due to the fact that the adhesive and plaster layers could not penetrate the insulation boards. At the processing processing of such insulation boards in connection with adhesive and plaster layers namely the recycling components and the binder-free mineral fa compresses in such a way that they clog the pores in the insulation panels and any further penetration of the adhesive and cleaning materials and in particular the Prevent non-wettable liquids. In the ent by compression standing indentations will naturally more adhesive and / or cleaning material indented. When the restoring force is sufficient, the resilient eggs press properties of the mineral fibers are the not yet hardened components of the Kle top and plaster layers back. After curing, for example, the plaster layers show numerous small surveys, which are subsequently used Equalization of the surface must be covered. This results in a Additional expenditure in material and working time.

The small adhesive bond described above is after the end hardening of the adhesive and plaster layers is still significantly more demanding bar than, for example, the near-surface composite of the mineral fibers inside half of the insulation boards. Here it can lead to a so-called tensile stress called fur breakdown, in which the mineral fibers in a range of 5 up to 10 mm from the surface or the composite of insulation board ten and adhesive and / or plaster layers can be pulled out. The the transverse tensile strengths that can be achieved here are up to 70% lower than those at gl structure of the insulation boards achievable maximum strengths. It Add to that the phenol-urea-formal used as a binder Dehyde resin mixtures are extremely sensitive to alkalis and moisture react. This reaction leads to a further reduction in the transverse tension stability of the thermal insulation composite system. This transverse tensile strength is reduced changes as a result of time-dependent changes during use such that the stability of a thermal insulation composite system already can be endangered during use or at least as affected must be considered pregnant.  

To the disadvantages described above in the manufacture of insulation panels, in particular lamella panels for thermal insulation composite systems Avoid various methods of removing coarse dust, mine Ralf flakes or the like have been performed. These procedures be but are particularly limited to suction devices that are in the field of Sawing and other separation devices are arranged around the beginning there vacuum dust. In addition to blowing off the surface to be coated Areas according to EP 0 719 365 B1 have also been attempted Surfaces of the insulation boards with bristles made of different materials, with brushing different shapes and different movement games, around the non-load-bearing fiber material from the surface areas selectively loosen, pull out and then vacuum. This before way did not lead to the desired goal because the dispersion of the inhomogeneities was too large, so that the bristles do not work selectively could, but captured almost the entire surface and also the structure of the solid areas of the insulation boards damaged or even destroyed ten.

Mechanical processing of the surfaces of insulation boards led to this not to the desired goal, so that as an alternative the application of adhesion-promoting layers or impregnations was chosen to a ho he transverse tensile strength of the thermal insulation composite system to achieve. A The usual coating here consists, for example, of a mixture of aggregates that are easy to grind, such as chalk, marble powder, quartz in the grain size range from 10 to 60 µm, with water glass and plastic disper sions are bound. Due to the particle size, this coating could conditions despite the surface activity contained in the plastic dispersions ven, i.e. wetting substances do not penetrate into the insulation boards. Rather, these coatings remained on the surface, so that a substantial improvement in the transverse tensile strength of such insulation boards in Thermal insulation composite systems was not achieved. The introduction of fine  granular aggregates also required a larger amount of binders, to achieve the necessary internal strength in the insulation boards. Waive If one treats this larger amount of binder, the surface is chalked on stored layers easily and cause the Ge through their separating effect contrary to the intended effect. A major improvement in detention bond between the insulation boards and the coating could not be achieved.

Starting from this prior art, the object of the invention based on a generic method and a generic before to develop direction in such a way that a particular generic Coating in a simple manner and with a high adhesive force can be applied to the surface of insulation boards to this Insulation boards, especially lamellar boards, preferably in thermal insulation To be able to use composite systems in which the surfaces of the insulation plates are brought into contact with adhesive mortar and / or plaster layers, these coatings together with the insulation boards provide an intimate Verbund should enter into.

This task is solved in a first embodiment of the method according to the invention that at least a large surface surface, preferably the large surface to be coated with a coating surface of the mineral fiber web with a steep to right angle running air, steam and / or water jet is applied, which in the loose and / or arranged near the surface of the mineral fiber web weakly bound and / or disturbed mineral fibers in relation to the large surface promotes deeper areas of the mineral fiber web.

This is the case with this first embodiment of the method according to the invention provided that the surface of the mineral fiber web, in particular the Slat plates with a steep to right angle Air, steam and / or water jet is blown or sprayed on or  become. The nozzle diameters are preferably below approximately 1.2 mm. By air, steam and / or water are applied to the surface unbound fibers approx. 3 to a maximum of 20 mm deep in the mineral fiber web or the slat plates pressed. The located between or in the laminates mineral fibers are used in this treatment methodology in one area from 0.5 to approx. 5 mm deep in the structure of the mineral fiber web or the lamella Len plates pressed in. In the end result, only those of loose Mi. free of general fibers, supporting structures of the mineral fiber web or the La plates out, which then form a frictional connection with the coating Can enter into a bond and thus an improved adhesive effect between the coating and the mineral fiber web or the lamella plates chen. Alternatively or in addition, the compression can be carried out with an aqueous bin detergent solution or dispersion.

The surface is preferably pulsed with the air, steam and / or Water jet applied. An improvement in the effectiveness of this procedure is achieved in that the air, steam and / or water jet fine to very fine-grained aggregates, in particular glass beads, sand or the like be added. This will increase the effectiveness of the desired surface area design improved.

This will further improve the effective surface design achieved that the mineral fiber web with multiple air, steam and / or what is applied in a line-like manner, so that a uniform surface chenggestaltung is possible.

It is also provided that the mineral fiber web alternates with air and Water jets is applied. This process step is followed by a Compaction of the surface or areas close to the surface. Farther this ensures that those pressed into the surfaces Amounts of water limited to a depth of approx. 5 mm or this low are holding. In addition, it can be provided that in the mineral fiber  track water introduced by the steam and / or water jets is at least partially removed, in particular suctioned off, to make it too large Avoid dampening the mineral fiber web.

The pressures, nozzles used in this method according to the invention diameter, masses and amounts of solid additives, thus the intensity of the procedural treatment is to be chosen so that the structure of the wear the laminates, thus the mineral fa that are bonded together is not harmed.

As an alternative to the above solution, see a second Solution of the task in a second embodiment of the Erfin that at least a large surface, preferably that with a Coating to be coated large surface of the mineral fiber web, esp special a large-sized slat plate, with a vacuum is struck to be arranged in the near-surface area of the mineral fiber web loose and / or weakly bound and / or their position disturbed mine Extract ral fibers from the area near the surface.

When manufacturing the as an endless mineral fiber web on systems with a ho The hourly throughput produced is large-format lamella plates se special suction method provided. It does not come with the suction on the throughput of air than on the sudden action relatively high negative pressure on the surface of the mineral fiber web. Preferential negative pressures of approximately 100 to 400 mbar, especially between 150 and 350 mbar provided by blowers or vacuum pumps can be built. The suction is preferably carried out immediately above half of the surfaces to be processed.

According to a further feature of the invention it is provided that the suction gene takes place in one or more stages, where appropriate different heights Vacuums in the individual stages are provided for machining  perform in a first step only the mine to be extracted ral fibers recorded directly in the surface area, whereas in further processes rens steps the deeper fibers are to be detected.

The suction nozzles that can be used for this purpose can consist of narrow slots or two-dimensional bodies exist, in which nozzles are inserted overlapping the surface. The suction nozzles are at a distance of approx. 1 to 2 mm, so if possible guided close to the surface of the mineral fiber sheet or the insulation boards. To give an even distance of the suction nozzles relative to one If necessary, ensure uneven surface of the mineral fiber web the suction nozzles, for example, through narrow guide wheels or rollers Support on the untreated surface of the mineral fiber web. At the This procedure must also ensure that the mine ralfaserbahn or the slat plates are not drawn to the suction nozzles the suction nozzle or not on the surface of the mineral fiber web or the lamella plates.

The suction nozzles can, for example, also rotate over the surface the mineral fiber web or the slat plates.

By contactless suction of the loose and / or weakly bound and / or mineral fibers disturbed in their position, deflections from the company and re-densification of the fibers on the surface of the mineral fa avoided railway.

If the weight of the slat plates is not high enough, the gently pressed together to form an endless layer adds. The lamellar plates can also be supported by laterally engaging moving Claws are held.

With this method, 20 to 50 g of fibers can be extracted per square meter become. The extracted mineral fibers are then reshaped  coarse separators, for example a cyclone, and fine separators, For example, a filter system recycled and a melting process guided.

In addition to this second embodiment of the Ver driving can be provided that the first embodiment of the inventions method according to the above-described suction method ren connects. As a result, the compaction depths with regard to the removal of the flat-stored mineral fibers can be significantly increased. As a result, it is in the case that not all flat-lying mineral fibers have been suctioned off, a compensating near-surface Ver Seal using a steep to right angle to the surface air, steam and / or water jets hitting the mineral fiber web achieve.

Depending on the surface properties of the mineral fiber web and the Subsequent surface treatment can include surface compaction Use water jets before vacuuming or between, for example several suction processes or stages. That in the Water penetration improves because of the compression of the surface Surface the effect of suction. Another advantage of this approach wise is that the water can then remain in situ or is only partially suctioned off, so that it is the subsequent wetting of the Surface of the mineral fiber web with impregnating agents or coatings facilitated.

According to a third embodiment of the method according to the invention Solution to the task described in the introduction provided that at least in a large surface, preferably in a coating large surface of the mineral fiber web to be coated, a mine capillary-active substance that wets well and is introduced into a Adhesive layer converted and after its conversion from the surface of the  Mineral fiber web with adhesive, especially loose and / or weakly ge bound and / or in their position disturbed mineral fibers is withdrawn.

In this embodiment of the method according to the invention the loose and weakly bound mineral fibers and the non-fibrous par torn out of the surface of the mineral fiber web. With this out embodiment of the method according to the invention penetrates into the surface the mineral fiber web, in particular the lamella plates, be a good one wetting and capillary-active substance, which is then in a tough plastic cal, tensile adhesive layer converted and after their substantial curing again from the surface of the mineral fiber web or the slat panels is torn down. The torn off adhesive layer grows here in a much larger size Also includes mineral fibers in deeper areas that are poor in the Mi general fiber web or the slat plates are integrated. This mineral fa stars are removed and do not need to be subsequently impregnated the. From the load-bearing laminates of the mineral fiber web or the slats only mineral fibers are pulled off, which only over a schwä have a stronger bond. After the pretreatment, the surface of the Mi dense mineral fiber turf, which is characterized in that the mineral fibers are essentially right at an angle to the large surface of the lamella plates or the mineral fiber are arranged. This mineral fiber lawn is a good prerequisite as well as an excellent structure for the subsequent coating of the Insulation boards or the processing of the insulation boards especially in the Zu in connection with a composite thermal insulation system.

This method is preferably used in the area of the surfaces, which is subsequently achieved by gluing a partial surface with a facade in particular which are claimed.

According to a further feature of the invention, it is provided that the substance is introduced into the surface of the mineral fiber web at a depth close to the surface of 0.03 to 5 mm, in particular from 0.5 to 2 mm. The removal or the discharge from the surface is about 75 to 250 g / m ² surface with conventional lamella plates. If the substance forming the tear-off layer is used sparingly, the removal should be above approx. 50 g / m ² . For this embodiment of the process according to the invention, thermoplastic substances, such as bitumen, hot-melt adhesives in various compositions, waxes, polyolefins, and also polyurethanes, silicone resins, thermosets such as epoxy, polyester, phenol, furan resins or the like are particularly suitable because of their reusability . These substances are usually used in combination with, for example, PUR bitumen compounds.

This can be exceeded with the usually very tensile slat plates the optimum depth of impregnation with the substance, the tensile strength of the adhesive layer be too low compared to the transverse tensile strength of the composite, so that the Adhesive layer tears. In order to ensure a smooth process and ei It is therefore necessary to ensure complete removal of the adhesive layer proven to be advantageous, made of reinforcing materials, such as carrier fabrics Plastic fibers or metal threads, braids made of wires, fleeces or the same to incorporate into the substance or the adhesive layer. Will this Materials before applying the substance to the mineral fiber web or Placed lamella plates, the dosage of the substance is also facilitated and limits the maximum depth of penetration from the outset.

There is also the option of a bitumen sheet with woven or non-woven rest on the surface of the insulation sheet or the slat panels weld it together and remove it after it has cooled down, also here Corresponding mineral fibers that have an insufficient bond be removed from the surface. A reduction in tear-off forces can also be achieved in that the surface of the mineral fa serbahn or the slat plates only in partial areas with the substance or the adhesive layer is brought into contact. For this purpose, the substance or  Adhesive layer in narrow bands or reticulated on the surface of the mine ralfaserbahn or the slat plates are applied. The herge Insulation materials then displayed in the area of the processed areas ne extraordinarily good binding effect in relation to the adhesive mortar or the layers of plaster. This has also changed in the course of an economic Implementation of the method according to the invention has proven to be useful since at least the adhesive mortar usually streaked and / or punctiform will wear, so that a processing of the insulation materials in the with the Kle mortar areas to be joined is sufficient.

The from the surface of the mineral fiber web or the slat plates too together with the mineral fibers separated adhesive layer is preferably egg fed into a recycling process. For example, one such advantageous when using an inexpensive hot bitumen, which is poured or sprayed onto the surface of lamella plates. Like this soon the substance, here the hot bitumen, essentially solidifies, d. H. out hardens and forms the adhesive layer, the hot bitumen is removed from the surface the lamella plates are torn off and fed to a processing station, in which again transforms the hot bitumen into a liquid or viscous by thermal energy brought liquid state. The bitumen is put on in a catch basin finally heated further. The adhering mineral fibers and the non-fibrous components that have been removed from the surface of the lamella plates, partially sediment so that the bitumen is only a small amount finer Adheres to mineral fibers. This bitumen can then be used again be used by further slat plates. Only when the share of Mineral fibers has reached a certain size, must on a further Ver application of this bitumen. The service life of the bitumen can be extended, for example, that at regular intervals the fresh bitumen is added to the bitumen already used.

The bitumen enriched with mineral fibers can easily be in the form of a Coupling production for coating mineral wool roof insulation boards ver  be applied. The mineral fibers increase the viscosity of the bitumen and reduce the penetration of the insulation surface. At the same time the tensile strength of the bitumen is increased, so that a partial bond of roof waterproofing membranes or roof waterproofing films is possible. Alternatively, the bitumen doped with mineral fibers can also be used in road construction as well as in water and landfill construction.

The preceding statements regarding the reusability of Bitumen also applies to other substances, especially enamel glue too, because hot melt adhesive with a share of mineral fibers for gluing Exercise of glass fleeces, glass silk fabrics on mineral wool insulation boards or can be used to manufacture tread-resistant insulation boards.

Also in this embodiment of the method according to the invention the lamella plates or the mineral fiber web after removing the adhesive layer undergo air, steam and / or water jet treatment to remaining loose mineral fibers in deeper areas of the mineral fiber web or to promote the slat plates. But since there are substantial amounts of the loose mine ral fibers have already been removed with the adhesive layer, the compaction is fect here in the background. Moisture penetration of the Mi is important general fiber web or the slat plates at a depth of 5 to 10 mm below half of the surface.

To remove unevenness in the mineral fiber web after removing the adhesive layers or to compensate for the slat plates, it is according to another feature the invention provided that the surface of the mineral fiber web or Lamella plates are then coated with a top layer, the front preferably from a mixture of in particular finely ground mineral fa and binders. This top layer is pressure absorbing and flexible. In addition, the immediate coating of the surface has the Advantage that the upper created after the removal of the adhesive layer surface structures can be used directly and completely.  

The cover layer is preferably pressed into the surface and thereby into the special compacted. The application of the top layer can be supported due to a negative pressure on the opposite surface of the mineral fa serbahn or the slat plate.

According to a further feature of the invention it is provided that the deck layer of a thermal treatment to harden it on the surface is subjected. Thermal treatment has proven to be advantageous here the top layer by means of high-frequency energy radiation.

Solutions or quasi-solutions such as Kolloi come as impregnating agents de, but in particular substances, emulsions or dispersed as nanoparticles highly dispersed plastic dispersions are used, which the high inner Easily overcome the filter resistance of the mineral fiber mass. As with Games for suitable inorganic compounds can be sodium or potassium water glass alone or in mixtures with each other and with addition of plastic dispersions, silica sol, Ormocere for example with additives of alcohols, mono-aluminum phosphate and phosphoric acid solutions be called.

Moisturization of the near-surface zones of the mineral fiber web or of the lamellar plates enables a much easier penetration of the imprä alliances. Additions of surface-active substances improve the effect activity, but they also make a subsequent heating to over 140 to 150 ° C required to break down the surfactants. Are the surfaces Chenactive substances not rendered ineffective, they can later Use lead to at least local dampening of the insulation material. Therefore the depth of the impregnating layer should be limited to approx. 1 to 5 mm become.  

With regard to the method according to the invention, it has proven to be advantageous sen, the mineral fiber web using high pressure water jets with one pressure from preferably 120 to 250 bar to cut into individual sections finally form a lamella of a lamella plate or a lamella plate. When using this separation method, all in the near-surface Be abundant loose and weakly bound mineral fibers or not fibrous components removed. No dust formation can be observed. There forth is already through this process step, which be the above Written method may be upstream, a surface structure ge create that we the application of the methods described above considerably simplified, since a lower proportion of loose or weakly bound NEN fibers or non-fibrous components must be removed. This The procedure has been particularly with that described above Extraction method proved to be advantageous.

With regard to the coating according to the invention for a mineral fiber web, especially for lamellar plates following the removal of loose and / or weakly bound and / or mineral fibers disturbed in their position of at least a large surface of the mineral fiber web and / or the Lamellar plates according to one of the methods described above The large surface is applicable, it is intended that the coating is pressure absorbing and flexible and has an affinity for plasters, adhesive mortars and having plastic dispersions or the like. This coating facilitates the processing of such mineral fiber products and especially especially improved adhesion of the adhesive mortar and the plastering systems the mineral fiber products safely.

According to a further feature of the invention it is provided that the loading layering of components impregnated with mineral fibers, such as colloids, substances dispersed as nanoparticles, emulsions or highly dispersed art material dispersions. The coating is preferred as components tion inorganic compounds, such as sodium or potassium water glass alone or  in mixtures with or without the addition of plastic dispersions, silica sol, Ormocere, with or without the addition of alcohol, mono-aluminum phosphate and / or Phosphoric acid solutions are provided.

In addition, the coating can include surface-active substances, for example have wise surfactants.

In a special way, a top layer has proven to be advantageous a mixture of mineral fibers and binders. For example a preparation of finely ground mineral fibers of the same is suitable Provenance as it existed in the mineral fiber web or in the lamella plates gene with water glass, Ormoceren, monoaluminum phosphate phosphor acid-CaO mixtures, optionally modified by plastic dispersers ions, thickeners, etc. can be mixed. This top layer is on distributed over the surface of the mineral fiber web or the lamella plates. Since she is not brushable due to its brittleness, or the surface of the Mi general fiber web or the lamella plates are regularly roughened, the masses with narrow strip-shaped tools have to be similar to the so Tampern mentioned in the installation of bituminous road surfaces in pressed the surface of the mineral fiber web or the lamella plates and there at be compacted.

The coating formed in this way is well permeable to air, so that supports a slight negative pressure on the insulation sheet during compaction or the slat plates can be applied to the excess bandage medium solution in the impregnation zone of the mineral fiber web or the slats to suck plates.

The top layer can preferably be made of alkali-resistant staple fibers Layered textile glass fibers, natural and plastic fibers can be added.  

Strippable coatings are obtained by adding the mixture made of mineral fibers and binders fine-grained aggregates with grain sizes ≦ 10 µm be attached. For this purpose, there are, for example, microfine ground cemen te and other fixed supplements. Of course there is also Possibility of coating from a commercially available adhesive mortar, a Plaster, a synthetic resin plaster or the like, so that the insulation plate is already prepared in the factory for processing on the construction site.

In a device according to the invention for the production of insulation boards, especially slat plates, made of mineral fibers is the solution of the front task presented above provided that above the För dereinrichtung a device for applying an adhesive layer on the mineral fiber web and / or the slat plates is arranged with the loose and / or mineral fibers from weakly bound and / or disrupted in their position at least a large surface of the mineral fiber web and / or the lamella lenplatten in one of the device for applying the adhesive layer in Förderrich device downstream of the conveyor and removed from the removal station become.

According to a further feature of the invention it is provided that the removal mestation has a carrier tape with a section parallel to the För is arranged in a continuous manner and can be connected to the adhesive layer, around the adhesive layer at the end of the extraction station from the mineral fiber web and / or tear off the slat plates.

The removal station is preferably followed by a coating station switches in which the mineral fiber web and / or the slat plates after removal NEN the adhesive layer with a preferably pressure absorbing and bending soft and have a high affinity for construction adhesives such as adhesive mortar the top layer is pre-coated.  

The removal station has in particular a heating device with which the adhesive layer removed from the mineral fiber web or the lamella plates Components of mineral fibers are heated and removed from the removal station becomes.

According to a further feature of the invention it is provided that the removal mestation a storage and collection container for collection and / or preparation tion of the mineral fiber web and / or the slat plates NEN adhesive layer is connected downstream.

It is also advantageous that the storage and collection container via a Line with at least one pump with the device for relinquishing detention layer is connected to the mineral fibers and / or lamella plates, so that the adhesive layer is reusable. Finally, the stock and Collection container can be heated according to a further feature of the invention.

Further features and advantages of the invention result from the Unteran sayings and the embodiment of an inventions described below inventive device for performing a Ver driving. The drawing shows:

Fig. 1 is a surface region of a lamella board according to the prior art;

Fig. 2 shows a surface area of a lamella plate after performing a method according to the invention and

Fig. 3 is a schematic representation of a portion of a device according to the invention for carrying out the method with which a lamella plate according to FIG. 2 is produced.

Fig. 1 shows a section of a major surface 1 of a lamella plate 2. The lamella plate 2 is cut off from a mineral fiber web, no longer shown, in the usual way, so that the large surface 1 of the lamella plate 2 was arranged at right angles between the large surfaces of the mineral fiber web.

The large surface 1 is shown in a vacuumed state, ie the large surface 1 was already subjected to a suction process with which loose or insufficiently bound mineral fibers were to be removed from the large surface 1 . The large surface 1 has an inherently uniform structure, with only a small number of small pores 3 being recognizable.

Fig. 3 shows a portion of a device for producing lamella plates 2 , the surfaces 1 of which are prepared in such a way that a coating to be applied forms a good adhesive bond with the lamella plate 2 .

The device has a conveyor belt 4 , on which the lamella plates 2 are placed, the longitudinal extent of the lamella plates 2 being oriented at right angles to the conveying direction of the conveyor belt 4 .

Above the conveyor belt 4 is a device 5 for the purpose of an adhesive layer 6 on the conveyor belt 4 facing surfaces 1 of the lamella plates 2 are arranged. The apparatus 5 consists of a funnel-shaped housing, the tapered outlet is oriented in the direction of the conveyor 4, the apparatus 5 is arranged over the entire width of the conveyor 4 and has a plurality of outlet openings. The outlet openings can be opened or closed in whole or in part, in order to apply the adhesive layer 6 over the entire surface or over part of the surface, that is to say streifenför mig on the surfaces 1 of the lamella plates 2 .

The adhesive layer 6 consists of hot bitumen, which is taken from a storage and sedimentation container 7 and fed to the device 5 via a line 8 with the pump 9 switched on.

In the conveying direction of the conveyor belt 4 behind the device 5 , a carrier belt 10 is arranged, which runs parallel to the conveyor belt 4 in a partial area. The width of the carrier belt 10 corresponds essentially to the width of the conveyor belt 4 , but at least to the width of the lamella plates 2 which rest on the conveyor belt 4 .

The distance between the carrier belt 10 and the conveyor belt 4 , which can optionally be changed, corresponds to the thickness of the lamella plates 2 plus the thickness of the adhesive layer 6 .

The carrier belt 10 is pressed onto the adhesive layer 6 in the region of its section running parallel to the conveyor belt 4 by means of pressure rollers 11 .

At the end extending parallel to the conveyor belt 4 portion of the Trä gerbandes 10 the carrier tape 10 is deflected by a deflection roller 12 of small diameter at an acute angle.

In the subsequent here range, the carrier tape 10 runs in Rich tung, arranged above the storage and sedimentation tank 7 heated roll 13 around which the carrier tape is guided towards the running parallel to the conveyor belt 4 portion of the carrier tape 10 10th

A radiant heater 14 is arranged opposite the heated roller 13 . Furthermore, a stripper 15 is provided, which is arranged below the heated roller 13 .

The taken from the storage and sedimentation 7 Heißbitu men is fed via line 8 of the device 5 to the task of an adhesive layer 6 on the surfaces 1 of the lamella plates 2 , from where the hot bitumen is applied over the entire surface of the surfaces 1 of the lamella plates 2 . The lamella plates 2 provided with the hot bitumen are continuously conveyed in the direction of an arrow 16 and reach with the not yet hardened hot bitumen in the region of the section of the carrier belt 10 running parallel to the conveyor belt 4 . The running in the direction of an arrow 17 speed of the carrier belt 10 corresponds to the speed of the conveyor belt 4th

The carrier tape 10 is pressed by the pressure rollers 11 to the adhesive layer 6 of hot bitumen, so that the adhesive layer 6 in this portion of the Trä gerbandes 10 also adheres to the carrier tape 10th The length of the section of the carrier belt 10 running parallel to the conveyor belt 4 is dimensioned in such a way that the adhesive layer 6 can harden to such an extent that loose or insufficiently, ie weakly bound and / or disrupted mineral fibers adhere to the adhesive layer 6 .

At the end extending parallel to the conveyor belt 4 portion of the Trä gerbandes 10 is now adhering to the carrier tape 10 adhesive layer 6 sharply deflected in the direction of the heated roll. 13 The deflection he follows in a direction that corresponds approximately to the opposite direction of the conveying direction of the conveyor belt 4 . It should be noted here that the sharper the deflection of the carrier tape 10 , the easier the adhesive layer 6 can be torn off the lamella plates 2 . The deflection angle must be flatter, the more brittle the adhesive layer 6 is. With the adhesive layer 6 are made of the surfaces 1 of the lamella plates 2 loose and / or weakly Tied and / or disturbed in their position mineral fibers herausgeris sen so that the lamella plates 2 is a highly open-pored surface 1 preserver th that the inclusion of a subsequently applied coating serves. Here, the open-pore structure of the surfaces 1 of the lamella plates 2 represents the possibility of a good adhesive bond between the coating and the lamella plates 2. The reason for this lies in the possibility of the coating device, at least penetrate into areas of the lamella plates 2 near the surface.

The torn-off from the lamella plates 2 adhesive layer 6 is then supplied to the heater 14 and the heated roller 13 so that the adhesive layer is remelted 6 and to the stripper 15 che on the particular surface of the carrier tape 10 is peeled off before being with mineral fibers enriched adhesive layer 6 is fed to the storage and sedimentation container 7 . The storage and sedimentation container 7 is also heated, so that curing of the hot bitumen to be used as the adhesive layer 6 is prevented. In addition, the heating of the storage and sedimentation container 7 leads to a high liquidity of the hot bitumen, so that the mineral fibers contained in the hot bitumen and the non-fibrous components sediment at least partially. In Fig. 3, such a sediment layer 18 is shown in the bottom portion of the storage and sedimentation. 7

The hot bitumen with the enriched fine fibers can be used for a new treatment of additional lamella plates 2 . By adding fresh hot bitumen, the number of possible cycles is increased until the fiber content prevents further use.

The hot bitumen enriched with mineral fibers can easily be in shape a coupling production for coating mineral wool roof insulation panels be used. The mineral fibers increase the viscosity of the hot bitumen and reduce the penetration of the insulation surface. At the same time the tensile strength of the hot bitumen is increased, so that a partial Adhesion of roof sealing sheets or roof sealing films with the hot bitumen becomes possible. In addition, this can be done with mineral fibers Doped hot bitumen, for example in road construction, in water and de use poniebau.  

The surface 1 of a laminated sheet 2 treated with the device shown in FIG. 3 is shown in FIG. 2. After removal of the adhesive layer 6 , most of the weakly bound mineral fibers are also removed from the gussets between the supporting mineral fiber laminates. There have been numerous recesses, in particular pores 3 , which can be seen as darker areas in FIG. 2. The entire surface 1 of the lamella plate 2 is roughened, that is to say the specific surface is significantly enlarged and prepared for the accommodation of a coating (not shown in more detail).

Claims (44)

1. A process for the production of insulating boards, in particular Lamellenplat th, from mineral fibers, preferably from rock wool, in which a silica melt is defibrated in a defibration device, then the mineral fibers, if necessary with the addition of a binding and / or impregnating agent, on one Conveying device are stored as a mineral fiber web, the mineral fiber web is then shaped and finally fed to a hardening furnace before the mineral fiber web is divided into individual insulation boards, with loose mineral fibers being removed from at least a large surface of the mineral fiber web and / or the insulation boards in a further step , characterized in that at least one large surface, preferably the large surface of the mineral fiber web to be coated with a coating, is subjected to an air, steam and / or water jet running at a steep to right angle, de r promotes loose and / or weakly bound and / or disturbed mineral fibers in the area of the mineral fiber web near the surface in areas of the mineral fiber web that are deeper than the large surface. 2. The method according to claim 1, characterized, that the large surface impulses with the air, steam and / or Water jet is applied. 3. The method according to claim 1, characterized, that the air, steam and / or water jet fine to very fine grain Zu blows, especially glass beads, sand or the like. are added.   4. The method according to claim 1, characterized, that the mineral fiber web with multiple air, steam and / or water radiation is applied in a line-like manner. 5. The method according to claim 1, characterized, that the mineral fiber web alternates with air and water jets is opened. 6. The method according to claim 1, characterized, that into the mineral fiber web through the steam and / or water jets introduced water at least partially removed, especially abge sucks. 7. Process for the production of insulation boards, in particular lamella mineral fibers, preferably rockwool, in which a silica table melt is defibrated in a defibration device closing the mineral fibers, if necessary with the addition of a binding and / or impregnating agent, on a conveyor as a mineral fiber web are deposited, then the mineral fiber web shaping processed and finally fed to a hardening furnace before the Mi general fiber web is divided into individual insulation boards, in one Another step is loose mineral fibers from at least one large one Surface of the mineral fiber web and / or the insulation boards removed the, characterized, that at least a large surface, preferably that with a loading the large surface of the mineral fiber web to be coated, especially a large-sized slat plate with a vacuum is applied to in the near-surface area of the mineral fiber web  arranged loose and / or weakly bound and / or in their position Extract disturbed mineral fibers from the area near the surface. 8. The method according to claim 7, characterized, that the surface with a vacuum between 100 and 400 mbar, is suctioned off in particular between 150 and 350 mbar. 9. The method according to claim 7, characterized, that the mineral fibers are sucked off suddenly. 10. The method according to claim 7, characterized, that the mineral fibers differ in several stages, especially with vacuum can be extracted. 11. The method according to claim 7, characterized, that the surface is suctioned off with suction nozzles, which in small Distance of preferably 1 to 2 mm without contact above the surface to be ordered. 12. The method according to claim 7, characterized, that side by side arranged slat plates at least during the suction connected positively and / or non-positively and / or held. 13. The method according to claim 7, characterized,  that the extracted mineral fibers are fed to a recycling process become. 14. The method according to claim 7, characterized, that the surface of the mineral fiber web or the slat plate in front or after sucking off the mineral fibers or between individual Suction steps with a steep to right angle air, steam and or water jet is applied. 15. The method according to claim 13, characterized, that water introduced into the surface is at least partially removed sucks. 16. Process for the production of insulation boards, in particular lamella mineral fibers, preferably rockwool, in which a silica table melt is defibrated in a defibration device closing the mineral fibers, if necessary with the addition of a binding and / or impregnating agent, on a conveyor as a mineral fiber web are deposited, then the mineral fiber web shaping processed and finally fed to a hardening furnace before the company serbahn is divided into individual insulation boards, with another Working step loose mineral fibers from at least one large surface the mineral fiber web and / or the insulation boards are removed, characterized, that at least in a large surface, preferably in the one with a Coating large surface of the mineral fiber web to be coated, a capillary active substance that wets the mineral fibers well is brought, which is converted into an adhesive layer and according to their order change from the surface of the mineral fiber web with adhering ins  special loose and / or weakly bound and / or ge in their position disrupted mineral fibers is withdrawn. 17. The method according to claim 16, characterized, that the substance at a depth close to the surface of 0.03 to 5 mm, ins special from 0.5 to 2 mm in the surface of the mineral fiber web brought. 18. The method according to claim 16, characterized in that a removal or discharge of at least 50 g / m ² , in particular 75 to 250 g / m ^{2 of} fibers from the mineral fiber web, in particular the lamella plate, is achieved with the substance converted into the adhesive layer . 19. The method according to claim 16, characterized, that the substance with a carrier fabric on the surface of the mine ralfaserbahn or the slat plates is applied, the Trä fabric preferably made of plastic fibers, metal threads, braids consists of wires, fleeces and / or the like. 20. The method according to claim 16, characterized, that as a substance a thermoplastic substance, especially Bitu men, hot melt adhesive, wax, polyolefins, polyurethanes, silicone resins, Thermosets, such as epoxy, polyester, phenol and / or furan resins be applied. 21. The method according to claim 16, characterized,  that the substance in parts of the surface, especially in the form from narrow bands or mesh-like. 22. The method according to claim 16, characterized, that from the surface along with the mineral fibers separated adhesive layer is fed to a recycling process. 23. The method according to any one of claims 1, 7 or 16, characterized, that the surface is finally coated with a top layer, which preferably consists of a mixture of in particular finely ground Mineral fibers and binders exist. 24. The method according to claim 23, characterized, that the cover layer is pressed into the surface and in particular re is compressed. 25. The method according to claim 23, characterized, that the application of the cover layer by a vacuum on the ge opposite surface of the mineral fiber web or the slats plate is supported. 26. The method according to claim 23, characterized, that the top layer undergoes a thermal treatment to harden it undergoes on the surface. 27. The method according to claim 23, characterized,  that the thermal treatment of the top layer by means of high-frequency Energy radiation is carried out. 28. The method according to claim 16, characterized, that the surface of the mineral fiber web after removing the adhesive layer with a steep to right angle Air, steam and or water jet is applied. 29. The method according to any one of claims 1, 7 or 16, characterized, that the mineral fiber web with a high pressure water jet Pressure of preferably 120 to 250 bar cut into individual sections is then a lamella of a lamella plate or a Form lamella plate. 30. Coating for a mineral fiber web, especially for lamellar plate ten as a top layer following the removal of loose and / or mineral fibers of weakly bound and / or disordered at least a large surface of the mineral fiber web and / or the Lamellar plates according to a method according to one of claims 1, 7 or 16 can be applied to the large surface, characterized, that the top layer is pressure absorbing and flexible and an affi unit for plasters, adhesive mortars, plastic dispersions or the like. 31. Coating according to claim 30, characterized, that the top layer impregnating mineral fiber components, such as Colloids, substances dispersed as nanoparticles, emulsions or highly dis has pergulated plastic dispersions.   32. Coating according to claim 31, characterized, that as components inorganic compounds such as sodium or potassium water glass alone or in mixtures with or without the addition of art material dispersions, silica sol, ormocers, with or without the addition of alcohol, Mo No aluminum phosphate and / or phosphoric acid solutions are provided are. 33. Coating according to claim 30, characterized, that the top layer of surface-active substances, for example Ten side. 34. Coating according to claim 30, characterized, that the top layer as a mixture of in particular finely ground Mineral fibers and binders is formed. 35. Coating according to claim 34, characterized, that the mineral fibers with the mineral fibers of the mineral fiber web or of the slat plates made from it match. 36. Coating according to claim 30, characterized, that the top layer of staple fibers made of alkali-resistant coated textile Has glass fibers, natural and / or plastic fibers. 37. Coating according to claim 30, characterized, that the top layer fine-grained aggregates with grain sizes <10 microns, ins  special hydraulic binders, such as microfine ge has ground cements and / or other solid aggregates. 38. Apparatus for the production of insulating boards, in particular lamella boards, made of mineral fibers, preferably of rock wool, with a Zerfa serungseinrichtung in which a silicate melt is defibrated in mineral fibers, a conveyor on which the mineral fibers, if necessary with the addition of a binding and / or impregnation agents are deposited as mineral fiber web, processing devices, for example cutting devices, in which the mineral fiber web is processed to shape and converted, for example, into lamella plates, and a hardening furnace, characterized in that a device ( 5 ) for the task is located above the conveyor device ( 4 ) an adhesive layer ( 6 ) on the mineral fiber web and / or the Lamellenplat th ( 2 ) is arranged with the loose and / or weakly bound and / or in their position disturbed mineral fibers of at least one large surface ( 1 ) of the mineral fiber web and / or Slat plates ( 2 ) in one of the front direction ( 5 ) to the task of the adhesive layer ( 6 ) in the conveying direction of the conveyor ( 4 ) downstream removal station can be removed. 39. Apparatus according to claim 38, characterized in that the removal station has a carrier tape ( 10 ) which is arranged with a section running parallel to the conveyor and can be connected to the adhesive layer ( 6 ) in order to remove the adhesive layer ( 6 ) at the end of the removal station from to tear off the mineral fiber web and / or the lamellar plates ( 2 ). 40. Device according to claim 38, characterized in that the removal station is followed by a coating station in which the mineral fiber web and / or the lamella plates ( 2 ) after removal of the adhesive layer ( 6 ) with a preferably pressure-absorbing and flexible and a high affinity for construction adhesives , how the top layer comprising adhesive mortar is or will be pre-coated. 41. Apparatus according to claim 38, characterized in that the removal station has a heating device ( 13 , 14 ) with which the adhesive layer ( 6 ) removed from the mineral fiber web or the lamella plates ( 2 ) is heated with constituents of mineral fibers and from the ent Removal station is removed. 42. Device according to claim 38, characterized in that the removal station is followed by a storage and collecting container ( 7 ) for receiving and / or processing the adhesive layer ( 6 ) removed from the mineral fiber web and / or the lamella plates ( 2 ). 43. Device according to claim 42, characterized in that the storage and collecting container ( 7 ) via a line ( 8 ) with at least one pump ( 9 ) with the device ( 5 ) for applying the adhesive layer ( 6 ) to the mineral fiber web and / or slat plates ( 2 ) is connected. 44. Device according to claim 42, characterized in that the storage and collecting container ( 7 ) is heatable.