EP1803862A1 - Insulating board with compressible edge zones and method for its production - Google Patents

Abstract

For the production of large-dimension insulation boards, for flat or angled roofs, a fiber material is used for the boards and especially mineral fibers and particularly derived from silicate melting of rock wool. The fibers are impregnated with a bonding agent, and carried through a press for longitudinal and lateral compression, and hardened in a kiln and cut into boards with an over-dimension of 3-25 mm and preferably 3-10 mm. The insulation boards (1) are aligned accurately on a conveyor, in a longitudinal and lateral orientation, for the edges to be trimmed and/or calibrated by at least two millers (11) and the like, while pressure belts (14) bear against the outer surfaces (2) on both sides. After machining the longitudinal sides (5), the board is rotated by 90[deg] for the lateral sides (4) to be cut.

Description

The invention relates to an insulating board made of fiber materials, in particular of mineral fibers, preferably rock wool, with two large, parallel and spaced-apart surfaces, which are interconnected via two cut surfaces and two longitudinal surfaces, wherein the cut surfaces perpendicular to the longitudinal surfaces and the longitudinal surfaces and the Cut surfaces are aligned at right angles to the large surfaces. Furthermore, the invention relates to a method for producing insulation boards of fiber materials, in particular of mineral fibers, preferably rock wool, in which produced from a silicate melt mineral fibers and stored with a binder and / or impregnating agent on a continuous conveyor as a mineral fiber web, the mineral fiber web mechanical processing , supplied as longitudinal and / or transverse compressions and a hardening furnace and is then divided along cutting surfaces in insulation boards.

From the prior art it is known to produce supporting roof shells of flat and / or flat inclined roofs, in particular in industrial buildings, such as factory and / or warehouses of profiled steel sheets. In order to reduce the construction costs for a supporting structures in such roofs, the steel sheets are stretched as far as possible. But this leads to easily deformable and vibratory trays or roof structures that are made of such steel sheets. A tray consists of one or more steel sheets and roof insulation panels resting thereon. Roof insulation panels made of mineral fibers, preferably rockwool, have proved particularly suitable for this purpose.

These roof insulation panels of mineral fibers have commercially available about 3-7% by mass of a thermosetting curing mixture of phenol-formaldehyde-urea resins, with which the mineral fibers are bound in a known method of melting, defibering and collecting a silicate starting material. Of course, not all mineral fibers can be sufficiently bound or the majority of the mineral fibers are only interlinked pointwise, in view of the small amounts of binders, which are a maximum of 4.5% by mass for the most frequently used mineral fiber products in this field of application still to obtain an elastic-resilient behavior of the mineral fiber mass.

The individual mineral fibers are coated during the manufacturing process with oil films to prevent capillary activity of the insulating material and the loss of condensation in the insulating layer.

The structure and orientation of the individual mineral fibers in the roof insulation panels as well as the bulk density can be varied within relatively wide limits. In the production plants formerly used, the mineral fibers wetted with binders and rendered hydrophobic are, after production, arranged on an air-permeable collecting belt arranged as a mineral fiber web under the slightly compressing, generally continuous conveyor belt formed by one or more continuous conveyors, for example conveyor belts and / or roller conveyors Effect of a sucked through cooling and transport air heaped up in a quasi-natural situation. Subsequently, the endless mineral fiber web is compressed and the binder cured in a curing oven before the mineral fiber web is subsequently divided into individual sections that form the roof insulation panels.

In this production results in a laminar structure of the mineral fiber assembly, which is characterized by a largely uniform orientation of the flat-mounted mineral fibers. In this Aufsammeltechnik the individual mineral fibers it always comes to preferred deposits and from bottom to top decreasing bulk density, resulting in the finished mineral fiber product by strong fluctuations in the bulk density and thus the mechanical properties of the example thereof produced Roof insulation makes negatively noticeable. In order to give the roof insulation panels at the softer places the necessary serviceability, the gross density of the entire roof insulation panel must be regularly raised. But that makes the roof insulation panel heavy and uneconomical for the manufacturer. Roof insulation panels, which are manufactured with this Aufsammeltechnik, have gross densities of about 150 - 190 kg / m ³ , possibly also higher values.

An advantage of these roof insulation panels, however, in both major axes almost the same and high bending strength and a relative insensitivity of the large surface against compressive stresses, as may occur, for example, when committing a covered with these roof insulation panels roof surface. However, these advantageous properties are canceled by the use of, for example, 1 to 1.25 m in length and 0.5 to 0.625 m width small-sized roof insulation panels again. In view of relatively wide distances between adjacent upper chords of a roof construction in question here and the large number freely projecting between two adjacent upper chords sections of the roof insulation panels Dachdämmplatten are very quickly damaged or destroyed in use, if they are not glued at least on viable steam and air barriers made of bituminous membranes or are designed.

Flat roofs and flat roofs are made much more economically by eliminating the need for gluing the individual layers of the roof insulation. As an air barrier and / or vapor barrier thin films made of polyethylene are designed loosely, the materials can not exert the roof insulation supporting functions. Finally, a roof seal is applied to the insulating layer, which consists at least of foils and / or bituminous sheets and optionally of a metal sheet. The roof seal and at the same time the roof insulation panels of the insulating layer are fixed by screwed into the profiled tray, preferably in the region of their upper straps screws, with each screw a plate is installed, which is to prevent a pulling through the screw heads by the pressure of the screw head on the roof seal is distributed over a larger area.

The roof insulation panels used for this purpose have a special structure. First, natural fluctuations are per unit of time produced mineral fibers and fluctuations in the deposition of mineral fiber mass thereby greatly reduced that a thin as possible, so-called primary nonwoven deposited by pendulum movements on a second conveyor belt in the desired thickness and such formed secondary nonwoven endless mineral fiber web is then conveyed into a Auffaltungsseinrichtung where the mineral fiber web (Secondary web) is subjected to intensive longitudinal and simultaneous height compression. The consequences are in the production and thus conveying direction intensively deformed with each other and steeply arranged to the large surfaces of the secondary nonwoven individual mineral fibers. Transversely to the production direction, the secondary nonwoven has a seemingly laminar structure.

The secondary web then passes through, possibly after further mechanical processing stations, such as compression areas a curing oven in which cured the binder and the secondary web is fixed in its geometry. After leaving the curing oven and a downstream cooling zone, the secondary web is trimmed by means of circular saws arranged parallel to the production direction. In this case, a several centimeters wide, previously also still laterally compressed strip of secondary web is separated, which also gives the saw a certain leadership. The fixed positioned with large-sized saw blades saws generally produce two mutually parallel longitudinal surfaces which are parallel to the conveying direction and thus along the secondary web. In order to achieve as parallel as possible alignment of the longitudinal surfaces, the axis of the saw blades must be aligned exactly. However, in the case of saws that are not oriented with sufficient accuracy, a slight deviation of the saw blade axis from the horizontal axis can readily occur, so that the longitudinal surfaces are not oriented parallel to one another and / or not exactly perpendicular to the large surfaces of the roof insulating panels to be formed from the secondary nonwoven.

The width of the production line and thus the distance between the two saws limit the maximum length of the roof insulation panels. This roof insulation panels are separated according to the desired width by running cross-saws with saw blades of the endless secondary web. The particularly large-sized, large-toothed circular saw blades of the cross saws are constantly driven because of their mass and cooling. A measuring device determines the instantaneous conveying speed of the secondary web and controls a drive moving the saw in the conveying direction with the conveying speed of the secondary web. In the area of the desired separating cut, the cross-cut saw is pushed through the secondary web at a feed rate of several meters per second transversely to the conveying direction. The accuracy with which the area of the separating cut is to be controlled is on the order of ± 2 mm, plus deviations from the perpendicularity of ± 1.5 - 2.5 mm per 2 m width of the secondary nonwoven. However, such precise control of the cross section is not achieved with the known systems and controls, which is also reflected in the level represented by the valid standards.

In accordance with DIN 18165 Part 1 Ed. 1991, deviations of ± 2% of the length and width of the insulation boards from the mean value of the random sample and a deviation of the perpendicularity from 3 mm to 500 mm length and / or width of the roof insulation boards are permitted. Deviations in the length of ± 2% in length and ± 1.5% in width are also permitted in the future European harmonized standard DIN EN 13162 -Specification of factory-made mineral wool products. Deviations from perpendicularity in length and width shall not exceed 5 mm / per meter of length or width. With regard to the squareness in the thickness direction of the insulation boards, no requirements are made.

The roof insulation panels separated from the secondary nonwoven are then superimposed without further treatment, e.g. stacked on transport pallets and covered, for example, with plastic films to protect against the weather.

The roof insulation panels are preferably produced as large-sized elements with dimensions of for example 2 m length and 1.2 m width and about 40 to 160 mm thickness. On the one hand, these roof insulation panels can be transported and laid much faster and, on the other hand, they react to loads on their large surfaces such as multi-panel beams and are therefore right from the start more resistant than small-format roof insulation panels.

Roof insulation panels with steep but directional arrangement of the individual mineral fibers have high compressive stress, point load according to DIN 12430 and transverse tensile strength at relatively lower densities, while bending tensile strength parallel to the production direction is only one-third to one-sixth that of transverse bending strength , Often such roof insulation panels break apart during transport to the processing site. The steep arrangement of the individual fibers also leads to a reduction of the puncture resistance of the arranged between the upper chords of the profiled tray shell area of the roof insulation panels.

A variation of these roof insulation panels described above has to avoid in particular the low puncture resistance on an integrated cover layer with about 180 to 220 kg / m ³ particularly highly compressed mineral fibers.

All roof insulation panels made of mineral fibers are very stiff in itself, so that even the edge areas during installation can not or only very slightly compress. The roof insulation panels are laid offset on the tray against each other. Roof insulation panels with particularly direction-dependent bending tensile strengths are usually designed with their longitudinal axis transversely to the profile direction of the support shell, ie transversely to the upper chords and thus also to a lower chord of the support shell arranged between each two upper chords. Therefore, tolerances in the width of the roof insulation panels as well as the skewness with respect to the dimensions lead to gaping joints in the insulating layer. For larger insulation thickness already not inconsiderable deflection of the supporting shell forming profile sheets already affects, as the joints in the Zugbereich wide, in principle but above are compressed. This movement is already successively in the occupancy of the trays and then again with additional loads.
The gaping joints, however, represent thermal bridges, which significantly reduced the insulation effect. Since the individual webs of the air-blocking films are usually not glued together and not tightly connected to the adjacent components, in principle, always warm air from the building interior flow through and above the often over the lower chords sagging films along and finally reach without further resistance between the roof insulation in the spaces between the insulation layer and loosely lying roof seals. Dewing water forms immediately on its undersides. If this does not quickly evaporate again and can diffuse outward on the roof seals, it will cause moisture penetration of the roof insulation panels, which not only significantly reduces their insulation effect, but also leads to significant reductions in strength and corrosion of the fasteners, namely the screws and plates.

Starting from this prior art, the invention is based on the object, an insulating board, such as a roof insulating board and a method for their preparation, to provide which can be tightly pushed during installation without great physical effort and the production of these insulation panels in a simple and cost-effective manner is possible, with the disadvantages of the prior art described above are excluded.

The solution of this problem provides in a method according to the invention that one of the cut surfaces and one of the longitudinal surfaces of the insulation boards are elasticized.

On the part of the insulation board according to the invention, a solution to the problem is provided that at least one of the cut surfaces and one of the longitudinal surfaces, preferably by a Elastifizierung and / or a certain fiber orientation has compressible zone.

The treatment according to the invention of the lateral surfaces of insulation boards, in particular of roof insulation panels, can lead to a significantly increased compressibility of the surfaces, so that the insulation boards, in particular the roof insulation boards, can already be pushed tightly in this way during laying without great effort.

• Um offene Fugen zwischen den einzelnen Dämmplatten, beispielsweise Dachdämmplatten zu vermeiden, dürfen keine oder nur sehr geringe Abweichungen von den Nennwerten der Abmessungen und den rechten Winkeln an den Ecken der Dämmplatten, beispielsweise Dachdämmplatten auftreten.

Further features of the invention will become apparent from the dependent claims. Reference is made to the following with regard to the embodiment of the invention and its advantages:

• In order to avoid open joints between the individual insulation panels, for example roof insulation panels, no or only very small deviations from the nominal values of the dimensions and the right angles at the corners of the insulation panels, for example roof insulation panels, may occur.

With the same goal, the lateral surfaces can be loosened by several parallel to the large surfaces and each other incisions. The incisions may also be formed as recesses, for example as grooves with a width ≤ 2 mm.

A loosening of the mineral fiber structure and thus a locally limited reduction in the stiffness of the insulating board, such as roof insulation can be achieved by the lateral surfaces by means of at least one, about a parallel axis to the lateral surfaces rotating, preferably toothed pressure roller and are drilled into a depth of up to about 20 mm, but preferably only 3 to 10 mm are strongly stressed on pressure and shear. The limitation of the structural changes to this depth of possible deviations from the nominal length and width dimensions leads to no noticeable changes in the performance characteristics of the insulation boards, such as roof insulation panels under load.

The elastification can be limited to different zones in the height of the lateral surfaces. The depth of the action may vary depending on the orientation of the individual mineral fibers, which means that the lateral surfaces, which are arranged transversely to the original production direction and consequently the above-defined cut surfaces are compared to the longitudinal surfaces a shallower storage of the individual mineral fibers and must be less intensively loosened up in their structure than the mineral fibers in the longitudinal surfaces.

The elastification may optionally be on one of the opposite Cut surfaces and / or longitudinal surfaces are limited if during the installation of the insulation boards, such as roof insulation panels each an elasticized and a non-elasticized side surface are placed together. In this case, an identification of one of the lateral surfaces, in particular of the elasticized surface, has proven to be advantageous, since herewith the craftsman is given a laying aid.

Figur 1

einen Abschnitt einer Vorrichtung zur Herstellung von Dachdämmplatten in einer Draufsicht;

Figur 2

eine erste Ausführungsform einer Dachdämmplatte in einer Draufsicht;

Figur 3

eine zweite Ausführungsform einer Dachdämmplatte in einer Seitenansicht und

Figur 4

eine dritte Ausführungsform einer Dachdämmplatte in einer perspektivischen Ansicht.

Further features and advantages of the invention will become apparent from the following description of the accompanying drawings in which preferred embodiments of the device according to the invention and the roof insulation panels according to the invention are shown. In the drawing show:

FIG. 1

a section of an apparatus for the production of roof insulation panels in a plan view;

FIG. 2

a first embodiment of a roof insulation panel in a plan view;

FIG. 3

a second embodiment of a roof insulation panel in a side view and

FIG. 4

a third embodiment of a roof insulation panel in a perspective view.

1 shows a plan view of a section of a device for the production of roof insulation panels 1. This section of the device follows the known, not shown devices of a production plant following a curing oven and a cross saw, with a not shown in detail endless secondary web after curing of a binder contained in the secondary web into individual sections, which is subsequently subdivided yet to be treated roof insulation panels 1.

The roof insulation panels 1 are exaggerated in the figure in the form of a parallelogram in order to more clearly represent the oblique angle of the roof insulation panels 1 of different widths. Each roof insulating panel 1 has two parallel and spaced apart aligned large surfaces 2, 3 (Figure 3) and two cut surfaces 4 and two longitudinal surfaces 5 on. The cut surfaces 4 are formed by cutting a roof insulation board 1 from the non-illustrated secondary web. The longitudinal surfaces 5 extend substantially parallel to the conveying direction 6 represented by an arrow.

The roof insulation panels 1 are made of mineral fibers 7, which are bound with the binder.

As a result of production technology, the roof insulation panels 1 according to FIG. 1 are obliquely formed, so that roof insulation panels 1 that are rectangularly limited must be produced for proper and thermal bridge-free processing of such roof insulation panels 1 in the region of flat or flat roofed roofs from these oblique roof insulation panels. For this purpose, it is necessary to separate 5 wedge-shaped sections 8 from the oblique roof insulation panel 1 in the region of the longitudinal surfaces.

The device shown in Figure 1 has for this purpose a arranged in the conveying path 9 stop 10, which is aligned perpendicular to the conveying direction according to arrow 6. The stop 10 is subsequently arranged a device for cutting and / or machining the longitudinal surfaces 5 extending substantially parallel to the conveying direction. This device consists in the illustrated embodiment of the device of two rotationally symmetrical, cylindrical-shaped milling 11, of which one is arranged on both sides of the conveying path 9.

The milling cutters 11 have milling surfaces 12 which, as will be described below, can have a different contour. Depending on the desired width of the roof insulation panel 1, the milling cutters 11 can be adjusted in their distance from one another or to the central axis of the conveying path 9. The adjustment takes place here for both milling 11 evenly with respect to the central axis of the conveying path. 9

The stopper 10 is adjustable in a position relative to the conveying path 9 so that it protrudes in an upper position in the conveying path 9 and after Aligning the sloping roof insulation panel 1 releases this by moving into a lower position for further promotion. In its the rooftop roof panel 1 facing stop surface 13, the stop 10 on pressure sensors that detect a desired orientation of the rising roof insulation panel 1 and transmit to a controller not shown in detail for the stopper 10. This control is the incoming roof insulation panel 1 after reaching the desired orientation on the conveyor 9 for further processing free, the stopper 10 is moved to this end in its lower position.

The desired alignment of the roof insulation board 1 is achieved when the roof insulation board 1 rests with its leading cut surface 4 over the entire surface of the stop surface 13 of the stopper 10 and the center axis of the roof insulation board 1 in the region of this leading cutting surface 4 with the central axis of the conveying path 9 and thus the central axis of the stop 10 is aligned collinear. If the roof insulation panel 1 has reached this position, the stop 10 is moved out of the conveying path 9, so that the roof insulation panel 1 reaches the region of the conveying path 9 which is located downstream of the stop 10. The alignment of the roof insulation board 1 is effected for example by a slip between the roof insulation board 1 and the below the Dachdämmplattte 1 arranged, not shown conveying element, which may be formed as a conveyor belt or as a roller conveyor. Optionally, can be arranged laterally of the conveying path 9 slide elements, which laterally align the accumulating on the stop 10 roof insulation panel 1 to produce the above-mentioned Kolinearität the center axis of the roof insulation board 1, the conveying path 9 and the stopper 10.

The stop 10 of the downstream region of the conveying path 9 has a not shown in detail lower conveyor belt and an upper conveyor belt 14, which rotates about two pulleys 15, of which a guide roller 15 is driven. The distance between the upper conveyor belt 14 and the lower, the roof insulation board 1 carrying conveyor belt is adjustable in dependence of the material thickness of the roof insulation board 1. Here, the distance between the upper conveyor belt 14 and the lower conveyor belt is selected such that the Roof insulation 1 is clamped stationary at least during the milling operation with the milling 11 and an evasive movement of the roof insulation board 1 in the conveying direction 6 and perpendicular thereto is not possible.

In the present embodiment according to Figure 1, the roof insulation board 1 is guided past the stationary arranged milling 11. Alternatively, however, it may be provided that the roof insulation board 1 is stopped in the position shown in FIG. 1 and the milling cutters 11 are guided past the roof insulation board. Of course, there is also the possibility of a superimposed movement of the milling 11 and the roof insulation board. 1

A first embodiment of a processed roof insulation panel 1 is shown in FIG. It can be seen that, in contrast to the skewness of the roof insulation panels 1 in FIG. 1, the roof insulation panel 1 according to FIG. 1 now has right angles between the sectional surfaces 4 and the longitudinal surfaces 5. The same applies with regard to the angle between the surfaces 2, 3 and the cut surfaces 4 on the one hand and the longitudinal surfaces 5 on the other. The roof insulation board 1 is therefore cuboid.

The longitudinal surfaces 5 are wave-shaped, with each longitudinal surface 5 having alternating bell-tubes 16 and wave troughs 17. The antinodes 16 are designed such that they fill the troughs 17 completely and sealing when joining adjacent roof insulation panels 1. The preparation of the roof insulation panel 1 according to Figure 2 by means of a movement of the milling 11 perpendicular to the conveyor 9, wherein the frequency of movement of the milling 11 in combination with the conveying speed of the roof insulation panel 1 in the region of the conveying path 9 determines the configuration of the antinodes 16 and troughs 17 , In the embodiment according to FIG. 2, the milling surfaces 12 of the milling cutters 11 are identically designed in order to achieve an identical wave form in the area of both longitudinal surfaces 5.

Figure 3 shows two roof insulation panels 1 in side view, which are pushed toward each other to form a closed insulating layer on a flat or flat inclined roof in the direction of the arrows 18.

The sectional area 4 of the left roof insulating panel 1 differs from the sectional area 4 'of the right roof insulating panel 1 in that the sectional area 4 has an internal curvature 20 and the sectional area 4' has a correspondingly formed bulge 19. These contours are produced by milling 11 with different milling surfaces 12. By the bulge 19 and the inner curvature 20, the cut surfaces 4, 4 'are formed such that they form a kind of ball joint, so that a forming between the adjacent roof insulation panels 1 joint bending the roof insulation panels 1, for example, by a load on their large surfaces 2 or in vibrations of the roof insulation panels 1 supporting roof substructure not fully open, so that in this way thermal insulation bridges may arise.

The bulge 19 and the inner curvature 20 do not extend over the entire cut surfaces 4 or 4 ', but are limited to a central region of these cut surfaces 4 and 4'.

In addition, it can be seen that the roof insulation panels 1 have a compacted layer 21 of mineral fibers 7 in the region of their large surfaces 2. This compacting layer 21 is used to improve the compressive strength of the roof insulation panels 1. It may also be a layer 21, which is applied in the manner of a lamination on the roof insulation board 1.

Another embodiment of a roof insulation panel 1 is shown in FIG. In this embodiment of the roof insulating panel 1, it can be seen that the mineral fibers 7 in the production direction, i. in the conveying direction 6 have a flat storage within the roof insulation board 1, while they have transversely to the conveying direction 6 a steep storage.

In addition to the processing of the longitudinal surfaces 5 described with reference to FIGS. 2 and 3, in the embodiment of the roof insulation panel 1 according to FIG. 4 it is provided that a longitudinal surface 5 has a compressible zone 22 which is produced, for example, by loosening the mineral fiber structure in the area of this longitudinal surface 5. For this purpose, one of the cutter 11 downstream pressure roller (not shown) may be provided, which is formed toothed and the longitudinal surface 5 is subjected to pressure and shear. The zone 22 has a thickness of 5 mm.

The invention described above is not limited to the production of roof insulation panels 1. Rather, the inventive method and apparatus of the invention can be used whenever insulation boards made of mineral fibers with high accuracy in terms of their rectangular arrangement of their surfaces to each other for the design of a thermal insulation with high efficiency are necessary. For example, with the method according to the invention or the device according to the invention, it is also possible to produce such insulating boards which are used in the façade area, for example in conjunction with a thermal insulation composite system.

Claims (15)

Insulating board made of fiber materials, in particular of mineral fibers, preferably of rock wool, with two large, parallel and spaced-apart surfaces, which are interconnected via two cut surfaces and two longitudinal surfaces, wherein the cut surfaces perpendicular to the longitudinal surfaces and the longitudinal surfaces and the cut surfaces at right angles to the are aligned with large surfaces,
characterized,
in that at least one of the cut surfaces (4) and one of the longitudinal surfaces (5, 5 ') has a zone (22), preferably compressible by an elastification and / or a specific fiber orientation. Insulating board according to claim 1,
characterized,
that the cut surfaces (4) and / or longitudinal surfaces (5, 5 ') in the longitudinal direction have a waveform of oppositely disposed cut surfaces (4) and / or longitudinal surfaces (5, 5') are designed in such a corresponding that in the region of an antinode (16) a cut surface (4) and / or longitudinal surface (5, 5 ') a corresponding wave trough (17) in the opposite cut surface (4) and / or longitudinal surface (5, 5') is arranged. Insulating board according to claim 1,
characterized,
in that the compressible zone (22) extends over the entire length of the cut surface (4) and / or longitudinal surface (5, 5 '). Insulating board according to claim 1,
characterized,
that the compressible zone (22) has a depth of up to 20 mm, particularly 3 to 10 mm. Insulating board according to claim 1,
characterized,
that the compressible zone (22) is divided into several sections that are disposed over the height of the cut surfaces (4) and / or longitudinal surfaces (5, 5 ') distributed. Insulating board according to claim 1,
characterized,
that the cut surfaces (4) of the elastification of the longitudinal surfaces (5, 5 ') have different, preferably flat bearing mineral fibers (7) have a lower elastification. Insulating board according to claim 1,
characterized,
that the cut surfaces (4) and / or longitudinal surfaces (5, 5 ') have at least one, preferably several, in particular parallel to the large surfaces (2, 3) extending incisions and / or recesses. Insulating board according to claim 7,
characterized,
that the incisions and / or recesses have a width of at most 2 mm. Insulating board according to claim 1,
marked by
a maximum deviation in the width of ± 0.5 to 1 mm and / or maximum skewness of the cut surfaces (4) to the longitudinal surfaces (5, 5 ') of 0.5 to 1 mm in relation to a length of 1 m. A process for the production of insulating panels of fiber materials, in particular of mineral fibers, preferably of rock wool, in which produced from a silicate melt mineral fibers and deposited with a binder and / or impregnating agent on a continuous conveyor as a mineral fiber web, the mineral fiber web mechanical processing, such as longitudinal and / or transverse compressions and fed to a hardening furnace and then divided along cutting surfaces in insulation boards,
characterized,
that one of the cut surfaces and one of the longitudinal surfaces of the insulation board (1) are elasticized. Method according to claim 10,
characterized,
that for elastification of the side surface regions of the insulation boards (1) in the longitudinal surfaces (5, 5 ') and cut surfaces (4) substantially parallel to the large surfaces (2, 3) of the insulation boards (1) extending incisions and / or recesses, such as grooves with a maximum depth of 5 mm, preferably 2 mm are cut. Method according to claim 10,
characterized,
in that the longitudinal surfaces (5, 5 ') and cut surfaces (4) are profiled, in particular milled and / or ground, over the height of the insulating panels (1) in order to elastify the lateral surface areas of the insulating panels (1). Method according to claim 10,
characterized,
in that the longitudinal surfaces (5, 5 ') and cut surfaces (4) are loaded by a roller on pressure and / or shear in order to elastify the side surface regions of the insulation boards (1). Method according to claim 13,
characterized,
in that preferably a toothed roller is used to elasticize a region of up to 20 mm, preferably between 3 and 10 mm in the direction of the surface normal of the longitudinal surfaces (5, 5 ') and cut surfaces (4). Method according to claim 13,
characterized,
that the elastification of the longitudinal surfaces (5, 5 ') and cut surfaces (4) is limited locally, in particular over the thickness of the insulating panels (1).

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