EP1402128A1

EP1402128A1 - Method for producing roof insulation plates, roof insulation plates and device for implementing said method

Info

Publication number: EP1402128A1
Application number: EP02737977A
Authority: EP
Inventors: Gerd-Rüdiger Klose
Original assignee: Deutsche Rockwool Mineralwoll GmbH and Co OHG
Current assignee: Deutsche Rockwool Mineralwoll GmbH and Co OHG
Priority date: 2001-06-02
Filing date: 2002-04-22
Publication date: 2004-03-31
Anticipated expiration: 2022-04-22
Also published as: EP1803862B1; ES2400234T3; DK1402128T3; DE50213826D1; ATE441763T1; EP1402128B1; EP1803862A1; WO2002099213A1; DK1803862T3; PT1402128E

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

Process for the production of roof insulation boards, roof insulation boards and device for carrying out the process

The invention relates to a process for the production of, in particular, large-format roof insulation boards, preferably for flat and / or flat-pitched roofs, from fiber materials, in particular from mineral fibers, preferably from rock wool, in which mineral fibers are produced from a silicate melt and with a binding and / or impregnating agent are deposited on a continuous conveyor as a mineral fiber web, the mineral fiber web is fed to mechanical processing, such as longitudinal and / or transverse compressions and a hardening furnace, and is then divided into plates along cut surfaces. The invention further relates to roof insulation panels made of fiber materials, in particular of mineral fibers, preferably of rock wool, with two large surfaces which are arranged parallel and at a distance from one another and which are connected to one another via two cut surfaces and two longitudinal surfaces, the cut surfaces being perpendicular to the longitudinal surfaces and the longitudinal surfaces and Cut surfaces are aligned perpendicular to the large surfaces. Finally, the invention relates to a device for producing the above-mentioned roof insulation panels and for carrying out the above-mentioned method, with a conveying path, preferably at least one continuous conveyor, on which the roof insulation panels are conveyed to a packaging station.

It is known from the prior art to produce load-bearing roof shells from flat and / or gently sloping roofs, in particular in industrial buildings, such as factories and / or warehouses, from profiled steel sheets. In order to reduce the construction costs for a supporting structure on such roofs, the steel sheets are stretched as far as possible. However, this leads to easily deformable and vibrating support shells or roof structures which are produced from such steel sheets. A carrier shell consists of one or more steel sheets and roof insulation panels on top of them. Roof insulation panels made from mineral fibers, preferably from rock wool, have proven particularly suitable for this. These roof insulation boards made of mineral fibers have 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 process of melting, defusing and gathering together a silicate starting material. In view of the small amounts of binders, which amount to a maximum of 4.5% by mass in the most frequently used mineral fiber products in this area of application, naturally not all mineral fibers can be adequately bound or the majority of the mineral fibers will only be linked to one another at points, in addition to obtain a resilient behavior of the mineral fiber mass.

The individual mineral fibers are covered with oil films during the manufacturing process in order to prevent capillary activity of the insulation material and the failure of condensation in the insulation 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 previously used production plants, the mineral fibers wetted with binders and made hydrophobic are produced on an air-permeable collecting belt as a mineral fiber web under the slightly compressing line, usually formed by one or more continuous conveyors, for example conveyor belts and / or roller conveyors Effect of a cooling and transport air sucked through in a quasi natural position. The endless mineral fiber web is then compressed and the binder is cured in a hardening furnace before the mineral fiber web is then divided into individual sections that form the roof insulation boards.

This production results in a laminar structure of the mineral fiber arrangement, which is characterized by a largely uniform orientation of the flat-lying mineral fibers. at This collecting technique for the individual mineral fibers always results in preferred deposits and a bulk density that decreases from bottom to top, which has a negative effect on the finished mineral fiber product due to strong fluctuations in the bulk density and thus also in the mechanical properties of the roof insulation boards made from it. In order to give the roof insulation panels the necessary usability even in the softer areas, the bulk density of the entire roof insulation panel must be increased regularly. But this makes the roof insulation board heavy and uneconomical for the manufacturer. Roof insulation panels that are produced using this collection technique have bulk densities of approx. 150 - 190 kg / m ³ , possibly also higher values.

It is advantageous with these roof insulation panels that the bending strength is almost the same in both main axes, as well as relative

Insensitivity of the large surface to pressure loads, which can occur, for example, when walking on a roof surface covered with these roof insulation boards. This beneficial

However, properties are small-format by using, for example, 1 to 1, 25 m long and 0.5 to 0.625 m wide

Roof insulation panels lifted again. Given the relatively wide distances between adjacent top chords of one in question here

Roof structure and the variety freely between two neighboring ones

The upper insulation cantilevered sections of the roof insulation panels are very quickly damaged or destroyed in use if they are not at least based on stable vapor and air barriers

Bitumen sheets are glued or laid out.

Flat and flat-pitched roofs are manufactured much more economically by not bonding the individual layers of the roof insulation. As an air barrier and / or vapor barrier, thin foils made of polyethylene are loosely laid out, which, due to the material, cannot perform functions that support the roof insulation panels. Finally, a roof seal is applied to the insulation layer, which consists at least of foils and / or bitumen sheets and, if appropriate, of a metal sheet. The roof sealing and at the same time also the roof insulation panels of the insulation layer are fixed by screws screwed into the profiled support shell, preferably in the area of their top chords, whereby a plate is installed with each screw, which should prevent the screw heads from being pulled through by the pressure of the screw head on the roof sealing spread over a larger area.

The roof insulation panels used for this purpose have a special structure. First, natural fluctuations in the mineral fibers produced per unit of time and fluctuations in the deposition of the mineral fiber mass are greatly reduced by the fact that the thinnest possible, so-called primary fleece is deposited in the desired thickness by pendulum movements on a second conveyor belt and then an endless mineral fiber web formed in this way, called secondary fleece, into Unfolding facility is promoted where the mineral fiber web (secondary fleece) is subjected to an intensive longitudinal and simultaneous height compression. The consequences are intensely deformed with each other in the direction of production and therefore in the direction of conveyance, and steep with the big ones

Individual mineral fibers arranged on the surfaces of the secondary fleece. Transversely to the direction of production, the secondary fleece has an apparently laminar structure.

The secondary fleece then passes through a hardening furnace, possibly after further mechanical processing stations, such as compression areas, in which the binder is hardened and the geometry of the secondary fleece is fixed. After leaving the hardening furnace and a downstream cooling zone, the secondary fleece is trimmed using circular saws arranged parallel to the direction of production. A strip of secondary fleece that is several centimeters wide and previously compressed laterally is separated, which also gives the saw a certain amount of guidance. The fixedly positioned saws equipped with large-sized saw blades usually produce two parallel longitudinal surfaces, which run parallel to the conveying direction and thus along the secondary fleece. In order to achieve the most parallel alignment of the longitudinal surfaces, the axis of the saw blades must be exactly aligned. If the saws are not aligned carefully enough, the saw blade axis can easily deviate from the horizontal axis, so that the longitudinal surfaces are not parallel to each other and / or not exactly at right angles to the large surfaces of the roof insulation panels to be formed from the secondary fleece.

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

According to DIN 18165 Part 1 Edition 1991, deviations of ± 2% of the length and width of the insulation boards from the mean value of the sample and a deviation of the perpendicularity from 3 mm to 500 mm length and / or width of the roof insulation boards are permitted. Even in the future European harmonized standard DIN EN 13162 - specification of factory made products from mineral wool- deviations in length of ± 2% in length and ± 1.5% in width are permitted. Deviations from the rectangularity in length and width must not exceed 5 mm / meter or length or width. With regard to the rectangularity in the thickness direction of the insulation boards, no requirements are made.

The roof insulation panels separated from the secondary fleece are then stacked on top of each other without further treatment, e.g. stacked on transport pallets and covered with plastic sheeting to protect against the weather.

The roof insulation panels are preferably produced as large-format elements with dimensions of, for example, 2 m in length and 1, 2 m in width and approximately 40 to 160 mm in thickness. On the one hand, these roof insulation boards can be transported and installed much faster and, on the other hand, react to loads on their large surfaces like multi-span girders and are therefore more resistant from the outset than small-format roof insulation boards.

Roof insulation boards with a steep, but direction-dependent arrangement of the individual mineral fibers, with relatively low bulk densities, have high values for the compressive stress, the point load according to DIN 12430 and the transverse tensile strength, while the bending tensile strength parallel to the production direction is only one third to one sixth of that bending strength transverse to the production direction , Such roof insulation panels often break apart during transport to the processing site. The steep arrangement of the individual fibers also leads to a reduction in the punching resistance of the area of the roof insulation panels arranged between the upper chords of the profiled support shell.

A variation of these roof insulation panels described above has one to avoid in particular the low punching resistance integrated top layer with mineral fibers that are particularly highly compressed to approx. 180 to 220 kg / m ³ .

All roof insulation panels made of mineral fibers are very stiff in themselves, so that the edge areas cannot be compressed, or only very slightly, when laying. The roof insulation panels are laid offset on the support shell. Roof insulation panels with particularly direction-dependent bending tensile strengths are usually designed with their longitudinal axis transverse to the profile direction of the support shell, that is to say transversely to the upper chords and thus also to a lower flange of the support shell arranged between two upper chords. Tolerances in the width of the roof insulation boards, like the skew angle in relation to the dimensions, therefore lead to gaping joints in the insulation layer. With larger insulation thicknesses, the not inconsiderable deflection of the profiled sheets forming the support shell already has an effect, since the joints widen in the tension area, but in principle are compressed at the top. This movement takes place successively when the support shells are occupied and then again when there are additional loads.

The gaping joints, however, represent thermal bridges, which significantly reduce the insulating effect. Since the individual sheets of air-blocking foils are usually not glued tightly to one another and are also not tightly connected to the adjacent components, warm air can in principle always flow from inside the building through and above the foils that often sag over the lower chords, and ultimately without further resistance between them Roof insulation boards get into the spaces between the insulation layer and loose roof seals. Condensation forms immediately on the underside. If this cannot evaporate again quickly and diffuse outwards via the roof seals, the roof insulation panels become wet, which not only significantly reduces their insulating effect, but also leads to significant reductions in strength and corrosion of the fastening elements, namely the screws and plates. On the basis of this prior art, the object of the invention is to create a method and a device for carrying out the method, with which the production of roof insulation boards of higher dimensional accuracy is possible in a simple and cost-effective manner in order to achieve the ones described above Exclude disadvantages of the prior art.

The solution to this problem provides, in a method according to the invention, that the plates are aligned precisely on the continuous conveyor both in their longitudinal extension and in their transverse extension perpendicular to the longitudinal extension and then fed to their narrow sides with trimming.

On the part of the roof insulation panels according to the invention, the solution to the problem is that the roof insulation panels have a maximum deviation in width of ± 0.5 to 1 mm and / or maximum obliquity of the cut surfaces to the longitudinal surfaces of 0.5 to 1 mm in relation to one Have a length of 1 m.

Finally, a device is provided as a solution to the problem that a stop that can be introduced into the conveying path and that is oriented at right angles to the conveying direction is arranged in the conveying path and that the stop is followed by a device for cutting and / or machining that is essentially parallel to the conveying direction extending lateral surfaces of the roof insulation panels is arranged.

Further features of the invention emerge from the subclaims. With regard to the configuration of the invention and its advantages, reference is also made to the following:

In order to avoid open joints between the individual roof insulation panels, no or only very slight deviations from the nominal values of the Dimensions and the right angles occur at the corners of the roof insulation panels. In addition, larger roof areas are installed roof insulation panels that were manufactured at different times and, if necessary, in different production plants. According to the invention, roof insulation panels with deviations in the width of approx. ± 0.5 to 1 mm or a skew angle of max. about 0.5 to 1 mm per meter in terms of lengths and widths. These tolerances exclude the disadvantages mentioned at the outset at least to the extent that joints between adjacent roof insulation panels are designed to be so small that no thermal bridges are formed.

For this purpose, the roof insulation panels are generally manufactured with an oversize of approx. 3 to 10 mm and processed according to the invention.

In order to minimize the influence of the moving cross-saw on the width tolerances and the skew angle to the desired level, the insulation panels are first manufactured with such an oversize that the nominal dimensions are achieved after the excess surfaces have been removed.

According to the invention, the obliquely angled plates of different widths are e.g. driven against a stop that can be raised and lowered in the conveying path and is arranged exactly at a right angle to the conveying direction. The ascending roof insulation panel can be aligned either by slipping the smooth conveyor belt or by the transport rollers of a roller conveyor. Alternatively or additionally, the stop in its surface facing the rising insulation board can have pressure sensors which record the position of the rising insulation board and transmit it to a computer-aided control which initiates the further processing of the roof insulation board when the intended arrangement is reached.

In order to achieve the fastest possible alignment, which is independent of the slip between the conveyor and the rising roof insulation panel, the roof insulation panels are designed according to a further feature of Invention by pushing arranged on both sides of the conveyor line, preferably pneumatically or hydraulically driven and in particular on the basis of the values determined by the pressure sensors of the position of the rising roof insulation panel pushed into the position required for further processing.

Preferably, the roof insulation panel to be machined is kept in the preferred position for the machining, along with the pressure tapes lying on the large surfaces. The processing of the roof insulation board is carried out with milling cutters, grinding belts, grinding rollers and / or saws arranged on both sides of the conveyor line, to which the roof insulation board is guided. Alternatively, it can be provided that the abovementioned removal devices are moved past the surfaces of the roof insulation panel to be processed.

With the help of these removal devices, even very thin layers can be removed from the surfaces of the roof insulation board to be processed, which is not possible with conventional devices and methods.

The distance, for example, of the milling cutters, and thus the width of the panel, can be determined before the roof insulation panels are processed, or can be controlled, for example, by a laser measuring system as a measuring value transmitter. In this embodiment, it is possible to design the surfaces of the roof insulation panel to be machined, for example in a wave shape, the bellies and troughs correspondingly and in particular sealingly engaging adjacent roof insulation panels on the roof surface.

By rotating the roof insulation panels after passing through this processing station and using the same process technology, the surfaces not initially treated, namely when the roof insulation panels are separated from the secondary fleece, can be calibrated and reshaped, that is to say processed in accordance with the longitudinal surfaces. The side faces can be shaped in various ways by appropriate shaping of the milling cutters or in combination of several milling cutters. For example, bulging and convex or convex and concave lateral surfaces can be formed, which interact when the roof insulation panels are joined together on the roof surface in the manner of a ball joint, so that a joint between the adjacent roof insulation panels during the deflection and / or in the event of vibrations of the supporting shell does not open or at least does not open continuously. Other forms of the lateral surfaces can of course also be produced accordingly.

The treatment of the side surfaces of roof insulation panels with milling cutters can result in a significantly increased compressibility of the surfaces if the profiling of these surfaces is correspondingly fine, possibly graded over the height of the side surfaces, so that the roof insulation panels are already butted tightly during installation without great effort can be.

With the same aim, the lateral surfaces can be loosened up by several incisions running parallel to the large surfaces and to each other. The incisions can 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 rigidity of the roof insulation board can be achieved in that the lateral surfaces are rolled with the help of at least one, preferably toothed pressure roller rotating about an axis running parallel to the lateral surfaces and down to a depth about 20 mm, but preferably only 3 to 10 mm strong under pressure and shear. Limiting the structural changes to this depth of possible deviations from the nominal length and width dimensions does not lead to any noticeable changes in the usage properties of the roof insulation panels under loads. The elasticization can be limited to different zones in the height of the lateral surfaces. The depth of exposure can vary depending on the orientation of the individual mineral fibers, which means that the lateral surfaces that are arranged transversely to the original production direction and consequently the cutting surfaces defined above have a flatter bearing of the individual mineral fibers and the longitudinal surfaces their structure has to be loosened less intensively than the mineral fibers in the longitudinal surfaces.

The elastication can optionally be on one of the opposite. Cut surfaces and / or longitudinal surfaces are limited if an elasticized and a non-elasticized side surface are put together when laying the roof insulation panels. In this case, marking one of the lateral surfaces, in particular the elasticized surface, has proven to be advantageous, since this gives the craftsman a laying aid.

Further features and advantages of the invention result from the following description of the accompanying drawing, in which preferred embodiments of the device according to the invention and the roof insulation panels according to the invention are shown. The drawing shows:

Figure 1 shows a section of a device for producing roof insulation boards in a plan view;

Figure 2 shows a first embodiment of a roof insulation board in a

Top view;

Figure 3 shows a second embodiment of a roof insulation board in a

Side view and Figure 4 shows a third embodiment of a roof insulation board in a perspective view.

FIG. 1 shows a top view of a section of a device for producing roof insulation panels 1. This section of the device connects to the known, not shown, facilities of a production system following a hardening furnace and a cross saw, with which a not shown endless secondary fleece after hardening of a binder contained in the secondary fleece into individual sections, which are subsequently subdivided roof insulation panels 1.

The roof insulation panels 1 are shown exaggerated in the form of a parallelogram in order to show more clearly the skew angle of the roof insulation panels 1 of different widths. Each roof insulation panel 1 has two large surfaces 2, 3 (FIG. 3) which are aligned parallel and spaced apart from one another and two cut surfaces 4 and two longitudinal surfaces 5. The cut surfaces 4 are created by cutting a roof insulation panel 1 from the secondary fleece, not shown. The longitudinal surfaces 5 extend essentially parallel to the conveying direction 6 represented by an arrow.

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

Production-related, the roof insulation panels 1 are formed obliquely angled according to Figure 1, so that for proper and thermal bridge-free processing of such roof insulation panels 1 in the area of flat or inclined roofs, these obliquely angled roof insulation panels 1 must be produced with rectangularly limited roof insulation panels 1. For this purpose, it is necessary to separate 5 wedge-shaped sections 8 from the oblique-angled roof insulation panel 1 in the region of the longitudinal surfaces. For this purpose, the device shown in FIG. 1 has a stop 10 arranged in the conveying path 9, which is oriented at right angles to the conveying direction according to arrow 6. Arranged downstream of the stop 10 is a device for cutting and / or machining the longitudinal surfaces 5 which run essentially parallel to the conveying direction. In the illustrated embodiment of the device, this device consists of two rotationally symmetrical, roller-shaped milling cutters 11, one of which 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 board 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 is made evenly for both milling cutters 11 with respect to the central axis of the conveying path 9.

The stop 10 is adjustable in a position relative to the conveying path 9 in such a way that it projects into the conveying path 9 in an upper position and, after alignment of the ascending roof insulation panel 1, releases it for further conveyance by moving it into a lower position. In its stop surface 13 facing the rising roof insulation board 1, the stop 10 has pressure sensors which detect a desired orientation of the rising roof insulation board 1 and transmit it to a control for the stop 10, which is not shown in detail. This control releases the accumulating roof insulation panel 1 for further processing after reaching the desired orientation on the conveying path 9, the stop 10 being moved into its lower position for this purpose.

The desired orientation of the roof insulation board 1 is achieved when the leading cutting surface 4 of the roof insulation board 1 is in full contact with the stop surface 13 of the stop 10 and the central axis of the roof insulation board 1 in the area of this leading cutting surface 4 with the central axis of the conveying path 9 and thus the central axis of the 10th attack is collinear. When the roof insulation panel 1 has reached this position, the stop 10 is moved out of the conveyor path 9, so that the roof insulation panel 1 reaches the region of the conveyor path 9 downstream of the stop 10. The alignment of the roof insulation board 1 takes place, for example, by a slip between the roof insulation board 1 and the conveying element, not shown, arranged below the roof insulation board 1, which can be designed as a conveyor belt or as a roller conveyor. Optionally, slide elements can be arranged in addition to the side of the conveyor path 9, which laterally align the roof insulation panel 1 running onto the stop 10 in order to produce the above-mentioned colinearity of the central axis of the roof insulation panel 1, the conveyor path 9 and the stop 10.

The area of the conveyor path 9 downstream of the stop 10 has a lower conveyor belt (not shown in more detail) and an upper conveyor belt 14 which rotates over two deflection rollers 15, one of which deflection roller 15 is driven. The distance between the upper conveyor belt 14 and the lower conveyor belt carrying the roof insulation board 1 can be adjusted depending on 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 board 1 is clamped in place at least during the milling process with the milling cutters 11 and an evasive movement of the roof insulation board 1 in the conveying direction 6 or at right angles to it is not possible.

In the present exemplary embodiment according to FIG. 1, the roof insulation panel 1 is guided past the stationary milling cutters 11. Alternatively, it can 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 cutters 11 and the roof insulation board 1. A first exemplary embodiment of a machined roof insulation panel 1 is shown in FIG. 2. It can be seen that the roof insulation board 1 according to FIG. 1 deviates from the oblique angle of the roof insulation boards 1 in FIG. 1 and now has right angles between the cut surfaces 4 and the longitudinal surfaces 5. The same applies to the angles 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 panel 1 is therefore cuboid.

The longitudinal surfaces 5 are wave-shaped, each longitudinal surface 5 alternately having antinodes 16 and troughs 17. The

Wave bellies 16 are designed in such a way that they fill the wave troughs 17 completely and sealingly when adjacent roof insulation panels 1 are joined together. The roof insulation board 1 according to FIG. 2 is produced by moving the milling cutters 11 at right angles to the conveying path 9, the frequency of the movement of the milling cutters 11 being in combination with the

Conveying speed of the roof insulation board 1 in the area of the conveying path 9 determines the configuration of the wave bellies 16 and wave troughs 17. in the

2, the milling surfaces 12 of the milling cutters 11 are of identical design in order to achieve an identical wave shape in the region of both longitudinal surfaces 5.

FIG. 3 shows two roof insulation panels 1 in side view, which are pushed towards one another in the direction of arrows 18 to form a closed insulation layer on a flat or gently sloping roof.

The cut surface 4 of the left roof insulation board 1 differs from the cut surface 4 'of the right roof insulation board 1 in that the cut surface 4 has an inner curvature 20 and the cut surface 4' has a correspondingly shaped bulge 19. These contours are created by milling 11 with different milling surfaces 12. Due to the bulge 19 and the inner curvature 20, the cut surfaces 4, 4 'are designed such that they form a kind of ball joint, so that a joint is formed between the adjacent roof insulation panels 1 when the roof insulation panels 1 bend, for example due to a load not fully open on their large surfaces 2 or in the event of vibrations of the roof substructure carrying the roof insulation panels 1, so that thermal insulation bridges can arise as a result.

The bulge 19 and the inner curvature 20 do not extend over the entire cut surfaces 4 and 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 compressed layer 21 of mineral fibers 7 in the area of their large surfaces 2. This compressing layer 21 serves to improve the compressive strength of the roof insulation panels 1. It can also be a layer 21 which is applied to the roof insulation panel 1 in the manner of a lamination.

Another embodiment of a roof insulation panel 1 is shown in Figure 4. In this embodiment of the roof insulation board 1 it can be seen that the mineral fibers 7 in the production direction, i.e. have a flat bearing in the conveying direction 6 within the roof insulation panel 1, while they have a steep bearing transverse to the conveying direction 6.

In addition to the processing of the longitudinal surfaces 5 described with reference to FIGS. 2 and 3, in the exemplary embodiment of the roof insulation board 1 according to FIG. 4 it is provided that a longitudinal surface 5 has a compressible zone 22, which is generated, for example, by loosening the mineral fiber structure in the region of this longitudinal surface 5. For this purpose, a pressure roller (not shown) downstream of the milling cutter 11 can be provided, which is toothed and stresses the longitudinal surface 5 under pressure and shear. 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 invention The method and the device according to the invention are always used when insulating boards made of mineral fibers with a high degree of accuracy with regard to their right-angled arrangement of their surfaces relative to one another are necessary for the design of thermal insulation with high effectiveness. For example, the method according to the invention and the device according to the invention can also be used to produce insulation boards which are used in the facade area, for example in connection with a composite thermal insulation system.

Claims

Expectations

1. Process for the production of, in particular, large-format roof insulation panels, preferably for flat and / or flat inclined ones

Roofs, made of fiber materials, especially mineral fibers, preferably rock wool, in which mineral fibers are generated from a silicate melt and deposited with a binding and / or impregnating agent on a continuous conveyor as a mineral fiber web, the mineral fiber web mechanical processing, such as longitudinal and / or

Cross compressions and a hardening furnace are fed and then divided along cut surfaces into roof insulation panels, characterized in that the roof insulation panels (1) are both in their longitudinal extension and in their perpendicular to the longitudinal extension

Transverse extent is aligned precisely on a conveyor device and then fed to trimming and / or calibration of at least its longitudinal surfaces (5, 5 ').

2. The method according to claim 1, characterized in that the roof insulation panels (1) are clamped at least during the trimming between two pressure bands (14) resting on their large surfaces (2, 3).

3. The method according to claim 1, characterized in that the trimming with at least two milling cutters (11), grinding belts,

Grinding rollers and / or saws is carried out, which are arranged on both sides of the conveyor and are preferably adjustable in their distance from each other.

4. The method according to claim 1, characterized in that the cut surfaces (4) of the roof insulation panels (1) are aligned at right angles to the longitudinal direction of the conveyor.

5. The method according to claim 1, characterized in that the roof insulation panels (1) after trimming their longitudinal surfaces (5, 5 ') rotated by 90 ° and trimming the cut surfaces (4) are supplied.

6. The method according to claim 1, characterized in that the roof insulation panels (1) in the region of their longitudinal surfaces (5, 5 ') and / or cut surfaces (4) with an oversize of 3 to 25 mm, in particular 3 to 10 mm, and the Trimming are fed.

7. The method according to claim 1, characterized in that the roof insulation panels (1) for their alignment against a perpendicular to the conveying direction (6) extending, retractable and retractable

Stop (10) is moved in the conveying path (9) and pushed against the stop (10) for full-surface contact of the cutting surface (4) lying at the front in the conveying direction (6).

8. The method according to claim 7, characterized in that the required alignment of the roof insulation panels (1) in

Stop (10) arranged pressure sensors is determined.

9. The method according to claim 1, characterized in that the roof insulation panels (1) arranged laterally of the conveyor path (9), preferably hydraulically and / or pneumatically driven manipulators are moved into the alignment required for trimming.

10. The method according to claim 3, characterized in that the roof insulation panels (1) are moved past the milling cutters (11) or the milling cutters (11) past the roof insulation panels (11), or the movement of the roof insulation panels (1) and milling cutters ( 11) is combined.

11. The method according to claim 3, characterized in that the milling (11), grinding belts, grinding rollers and / or saws on opposite surfaces (4, 5, 5 ') of the roof insulation panels (1) corresponding recesses (20) and projections (19) be milled.

12. The method according to claim 3, characterized in that the distance between the cutters (11), grinding belts, grinding rollers and / or saws is set by means of a laser measuring system, preferably as a function of a computer-aided order management.

13. The method according to claim 1, characterized in that the longitudinal surfaces (5, 5 ') and / or cut surfaces (4) wavy or in another, the toothing arranged adjacent

Roof insulation panels (1) enabling geometric training to be calibrated and trained.

14. The method according to claim 1, characterized in that for the elasticization of the side surface areas of the roof insulation panels (1) in the longitudinal surfaces (5, 5 ') and / or cut surfaces (4) substantially parallel to the large surfaces (2, 3) of the roof insulation panels (1) running incisions and / or recesses, such as grooves with a maximum depth of 5 mm, preferably 2 mm.

15. The method according to claim 1, characterized in that for the elasticization of the side surface areas of the roof insulation panels (1), the longitudinal surfaces (5, 5 ') and / or cut surfaces (4) profiled over the height of the roof insulation panels (1), in particular milled and / or ground in.

16. The method according to claim 1, characterized in that for the elasticization of the side surface areas of the roof insulation panels (1), the longitudinal surfaces (5, 5 ') and / or cut surfaces (4) are loaded by a roller under pressure and / or shear.

17. The method according to claim 16, characterized in that preferably with a toothed roller a range of up to 20 mm, preferably between 3 and 10 mm in the direction of

Surface normals of the longitudinal surfaces (5, 5 ') and / or cut surfaces (4) is elasticized.

18. The method according to claim 16, characterized in that the elasticization of the longitudinal surfaces (5, 5 ') and / or cut surfaces (4) is limited locally, in particular via the thickness of the roof insulation panels (1).

19. The method according to claim 16, characterized in that only one of the oppositely arranged longitudinal surfaces (5, 5 ') and / or cut surfaces (4) is elasticized.

20. Roof insulation panels made from fiber materials, in particular from mineral fibers, preferably from rock wool, with two large surfaces arranged parallel and spaced apart from one another, which are connected to one another via two cut surfaces and two longitudinal surfaces, the cut surfaces being perpendicular to the longitudinal surfaces and the

Longitudinal surfaces and the cut surfaces are aligned at right angles to the large surfaces, characterized by a maximum deviation in width of ± 0.5 to 1 mm and / or maximum oblique angle of the cut surfaces (4) to the longitudinal surfaces

(5, 5 ') from 0.5 to 1 mm based on a length of 1 m.

21. Roof insulation panels according to claim 20, characterized in that the cut surfaces (4) and / or longitudinal surfaces (5, 5 ') with

Recesses (20) and / or projections (19) are formed so that adjacent cut surfaces (4) and / or longitudinal surfaces (5, 5 ') engage in one another in a sealing manner.

22. Roof insulation panels according to claim 21, characterized in that the recesses (20) and / or projections (19) allow at least limited pivoting mobility of the adjacent longitudinal surfaces (5, 5 ') and / or cut surfaces (4) to one another.

23. Roof insulation panels according to claim 20, characterized in that the recesses (20) are concave and the projections (19) are correspondingly convex.

24. Roof insulation panels according to claim 20, characterized in that the cut surfaces (4) and / or longitudinal surfaces (5, 5 ') have a wave shape in the longitudinal direction, which on opposite arranged cut surfaces (4) and / or longitudinal surfaces (5, 5 ') are designed in such a way that in the area of a shaft bulge (16) a cut surface (4) and / or longitudinal surface (5, 5') has a corresponding wave trough (17) in the opposite cutting surface (4) and / or longitudinal surface (5, 5 ') is arranged.

25. Roof insulation panels according to claim 20, characterized in that at least one of the cut surfaces (4) and / or longitudinal surfaces (5, 5 ') one, preferably by an elasticization and / or a specific one

Has fiber orientation compressible zone (22).

26. Roof insulation panels according to claim 25, characterized in that the compressible zone (22) over the entire length of the

Cutting surface (4) and / or longitudinal surface (5, 5 ') extends.

27. Roof insulation panels according to claim 25, characterized in that the compressible zone (22) has a depth of up to 20 mm, in particular 3 to 10 mm.

28. Roof insulation panels according to claim 25, characterized in that the compressible zone (22) is divided into different areas which are arranged distributed over the height of the cut surfaces (4) and / or the longitudinal surfaces (5, 5 ').

29. Roof insulation panels according to claim 20, characterized in that the cut surfaces (4) have a different elasticity from the elasticization of the longitudinal surfaces (5, 5 '), preferably with flat-mounted mineral fibers (7).

30. Roof insulation panels according to claim 20, characterized in 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) incisions and / or recesses ,

31. Roof insulation panels according to claim 29, characterized in that the incisions and / or recesses have a maximum width of 2 mm.

32. Device for producing roof insulation panels (1) according to claim 20 and for carrying out the method according to claim 1, with a conveying path (9), preferably at least one continuous conveyor on which the roof insulation panels (1) are fed to a packaging station, characterized in that in Conveyor path (9) in the conveying path (9) insertable stop (10) is arranged, which is oriented perpendicular to the conveying direction (6) and that the stop (10) is subsequently a device for cutting and / or machining the substantially parallel to Conveying direction (6) extending lateral surfaces (4, 5, 5 'of the roof insulation panels (1) is arranged.

33. Device according to claim 32, characterized in that the stop (10) has pressure sensors which detect a desired orientation of the running roof insulation panel (1) and transmit it to a control for the stop (10).

34. Device according to claim 32, characterized in that slide elements are arranged in the area of the stop (10) on both sides of the conveying path, which align the roof insulation panel (1) running onto the stop (10).

35. Apparatus according to claim 32, characterized in that the device for cutting and / or machining the lateral surfaces (4, 5, 5 ') of the roof insulation panels (1) which run essentially parallel to the conveying direction (6) and which consist of at least two rotationally symmetrical milling cutters (11), which are arranged on both sides of the conveyor path (9).

36. Apparatus according to claim 35, characterized in that the milling (11), the lateral surfaces (4, 5, 5 ')

Roof insulation panels (1) processing grinding devices downstream and / or saws are connected upstream.

37. Device according to claim 35 or 34, characterized in that the milling cutters (11), the grinding devices and / or the saws are arranged such that they can be adjusted in their distance from the conveying path (9) and / or can be moved parallel to the conveying path (9).

38. Device according to claim 35, characterized in that the milling cutters (11) have different designs for their milling surfaces

(12).

39. Apparatus according to claim 38, characterized in that the milling surfaces (12) are designed such that they are arranged in oppositely arranged lateral surfaces (4, 5, 5 ') Mill the corresponding recesses (20) and projections (19) in the roof insulation panels (1).

40. Device according to claim 38, characterized in that a milling surface (12) has a concave surface shape and the second milling surface (12) has a corresponding convex curvature.

41. Device according to claim 32, characterized in that in the area of the device for cutting and / or machining the side surfaces (4, 5, 5 ') of the roof insulation panels (1) which run essentially parallel to the conveying direction (6), pressure tapes ( 14) are arranged, which rest on the large surfaces (2, 3) of the roof insulation panels (1).

42. Device according to claim 32, characterized in that the device for cutting and / or machining of the lateral surfaces (4, 5, 5 ') of the roof insulation panels (1) which run essentially parallel to the conveying direction (6) has at least one preferably toothed pressure roller is arranged downstream, which acts on the lateral surfaces (4, 5, 5 ') of the roof insulation panels (1) for the elasticization of at least partial areas of the lateral surfaces (4, 5, 5').

43. Device according to claim 32, characterized in that at least one cutting tool is connected downstream of the device for the cutting and / or machining of the lateral surfaces (4, 5, 5 ') of the roof insulation panels (1) which run essentially parallel to the conveying direction (6) , which cuts and / or recesses in the lateral surfaces (4, 5, 5 ') of the Cut roof insulation panels (1), which are aligned parallel to the large surfaces (2, 3).

44. Apparatus according to claim 32, characterized in that the device for cutting and / or machining the substantially parallel to the conveying direction (6) lateral surfaces (4, 5, 5 ') of the roof insulation panels (1) has a turning station and the turning station A further device for cutting and / or machining the side surfaces (4, 5, 5 ') of the roof insulation panels (1) which run essentially parallel to the conveying direction (6) is connected downstream, so that all four side surfaces, namely the cut surfaces (4 ) and the longitudinal surfaces (5, 5 ') of the roof insulation panels (1) can be machined.