EP1402128B1 - Method for producing roof insulation plates, roof insulation plates and device for implementing said method - 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 a process for the production of roof insulation boards made of mineral fibers, preferably rockwool, in which mineral fibers are produced 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 is subjected to mechanical treatments such as longitudinal and / or transverse compressions and fed to a hardening furnace and then divided along cut surfaces in roof insulation panels. The invention further relates to roof insulation panels of Mineralfasem provided with binding and / or impregnating agents, 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 are aligned at right angles to the large surfaces. Finally, the invention relates to a device for producing 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.

From the prior art it is known to produce supporting roof shells, 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 structure 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 from mineral fibers, preferably rock wool, 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 nor to obtain a resilient elastic 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. at This collecting technique of the individual mineral fibers always leads to preferential deposits and from bottom to top decreasing bulk density, which makes negative in the finished mineral fiber product by strong fluctuations in density and thus the mechanical properties of the roof insulation produced therefrom, for example. 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 in the mineral fibers produced per unit time and variations in the deposition of mineral fiber mass are greatly reduced by a thin as possible, so-called primary nonwoven deposited by pendulum movements on a second conveyor belt in the desired thickness and then formed, called secondary nonwoven endless mineral fiber web then into a Folding device is promoted, 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 fixedly positioned saws equipped with large-format saw blades generally produce two longitudinal surfaces running parallel to each other, which run 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 at right angles 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 extra-large, coarse-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. Also in the future European harmonized standard DIN EN 13162 -Specification of factory-made products made of mineral wool- allow deviations in the length of ± 2% in length and ± 1.5% in width. 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 their large surfaces such as multi-field beams under load and are therefore more resistant from the outset 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 above-described roof insulation panels has to avoid in particular the low puncture resistance one integrated cover layer with about 200 to 200 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 directional 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 air-blocking films are usually not glued together tightly and also not tightly connected to the adjacent components, always warm air from the building inside through and above the often over the lower chords sagging slides along flow and ultimately without further resistance between the Roof insulation panels get into the spaces between the insulation layer and loose roof waterproofing. Dewing water forms immediately on its undersides. If this does not quickly evaporate again and can diffuse outward on the roof seals, it causes 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.

Furthermore, for example, from the US 3,549,738 A Insulating boards are known, which are formed on a front side with a tongue and on a corresponding end face with a slot matching size. Through this tongue-slot connection adjacent insulation boards can be positively connected to each other. In order for the insulation boards to form a well-insulating composite, the tongue and slot must mesh precisely with one another, which also requires a preferably exactly right-angled design of the board surfaces. Therefore, according to the US 3,549,738 A provided to put the still unbonded fiber mass on a conveyor and press it into a mold which has a slot shape substantially end side and a tongue shape at the other end, wherein the pulp is pressed on its large surfaces, so that excess material in the tongue or. Slot shape runs into it. At the same time, the material is heated and thus cured. The problem is that this manufacturing process by the process of pressing and curing within the mold is very time consuming.

Based on this prior art, the present invention seeks to provide a method and an apparatus for performing the method by which or with the production of roof insulation panels higher dimensional accuracy in a simple and cost-effective manner is possible to the disadvantages described above exclude the prior art.

The solution of this problem provides in a method according to the invention, that the roof insulation panels are aligned precisely in position on a conveyor both in their longitudinal extent, as well as in their perpendicular to the longitudinal extension transverse extension and then a trimming and / or calibration of at least their longitudinal surfaces.

As a result of this solution according to the invention, the roof insulation panels already reach the conveying device in their hardened form, wherein they then only their exact rectangular shape must be brought. The time-consuming process of preforming and curing takes place in a pre-procedural step. Since only the trimming and / or calibration must be performed on the conveyor, the manufacturing process can be much simpler and cheaper, because faster to be performed.

On the part of the roof insulation panels according to the invention is provided as a solution to the problem that the roof insulation panels a maximum deviation in the width of ± 0.5 to 1 mm and / or maximum skewness of the cut surfaces to the longitudinal surfaces of 0.5 to 1 mm based on a length of 1 m.

Finally, as a solution to the problem, a device is provided in which in the conveying path an insertable into the conveyor stop is arranged, which is aligned at right angles to the conveying direction and that the stop below a means for cutting and / or machining the running substantially parallel to the conveying direction lateral surfaces of the roof insulation panels is arranged.

• Um offene Fugen zwischen den einzelnen Dachdämmplatten zu vermeiden, dürfen keine oder nur sehr geringe Abweichungen von den Nennwerten der Abmessungen und den rechten Winkeln an den Ecken der Dachdämmplatten auftreten. Ferner werden größeren Dachflächen Dachdämmplatten verbaut, die zu unterschiedlichen Zeitpunkten und gegebenenfalls auch in unterschiedlichen Produktionsanlagen hergestellt worden sind. Erfindungsgemäß können Dachdämmplatten mit Abweichungen in der Breite von ca. ± 0,5 bis 1 mm oder einer Schiefwinkligkeit von max. ca. 0,5 bis 1 mm pro Meter in bezug auf Längen und Breiten hergestellt werden. Diese Toleranzen schließen die eingangs dargestellten Nachteile zumindest insoweit aus, dass Fugen zwischen benachbarten Dachdämmplatten derart klein ausgebildet sind, dass sich keine Wärmebrücken bilden.

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 roof insulation panels, there must be no or very little deviation from the nominal values of the dimensions and the right angles at the corners of the roof insulation panels. Furthermore, larger roofs roof insulation panels are installed, which have been produced at different times and, where appropriate, in different production facilities. According to the invention, roof insulation panels with deviations in the width of about ± 0.5 to 1 mm or a skewness of max. about 0.5 to 1 mm per meter in terms of lengths and widths are produced. These Tolerances exclude the disadvantages presented at least to the extent that joints between adjacent roof insulation panels are so small that form no thermal bridges.

For this purpose, the roof insulation panels are generally produced with an excess of about 3 to 10 mm and processed according to the invention.

In order to minimize the influence of the running cross saw on the width tolerances and the skewness to the desired level, the insulation boards are first produced with such an oversize that after removal of the surplus areas, the nominal dimensions are achieved.

According to the invention, the skewed, differently wide plates are e.g. moved against a liftable and retractable in the conveying stroke, which is arranged exactly at a right angle to the conveying direction. The alignment of the running roof insulation board can be done both on the slip of the smooth conveyor belt or the transport rollers of a roller conveyor. Alternatively or additionally, the stop may have pressure sensors in its area facing the leading insulation board, which detect the position of the incoming insulation board and transmit to a computer-aided control, which initiates the further processing of the roof insulation board upon reaching the intended arrangement.

In order to achieve the fastest possible, from slippage between the conveyor and the rising roof insulation board alignment, the roof insulation panels are according to a further feature of Invention pushed by 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 values of the position of the rising roof insulation slidings pushed into the required position for further processing.

Preferably, the roof insulation panel to be machined is held in the position preferred for machining along running pressure belts resting on the large surfaces. The processing of the roof insulation board is done with arranged on both sides of the conveyor section milling, sanding belts, sanding rollers and / or saws to which the roof insulation board is passed over. Alternatively, it can be provided that the abovementioned ablation devices are moved past the surfaces of the roof insulation panel to be machined.

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

The distance, for example, the milling and thus the width of the plate can be set prior to processing the roof insulation panels or, for example, each driven by a laser measuring system as a transmitter. In this embodiment, it is possible, for example, wave-shaped form the surfaces of the roof insulation board to be machined, wherein the shaft bellies and troughs adjacent roof insulating panels arranged on the roof surface correspondingly and in particular sealingly engage each other.

By rotation of the roof insulation panels after passing through this processing station and the application of the same process technology, the initially untreated surfaces, namely calibrated and formed during separation of the roof insulation panels from the secondary nonwoven cut surfaces, that is, processed according to the longitudinal surfaces.

By appropriate shape of the cutter or in combination of multiple cutters, the side surfaces can be formed in various ways. For example, pre-curved and convex and concave lateral surfaces are formed, which cooperate in the joining of the roof insulation panels on the roof surface in the manner of a ball joint, so that a gap between the adjacent roof insulation panels in the deflection and / or vibrations of the support shell not or at least not open continuously. Accordingly, of course, other forms of the lateral surfaces can be produced.

The treatment of the lateral surfaces of roof insulation panels with milling can lead to a significantly increased compressibility of the surfaces with correspondingly fine, optionally graded over the height of the lateral surfaces profiling of these surfaces, so that the roof insulation panels already encountered in this way when laying tight without great effort can be.

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 roof insulation board 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 driven to a depth to about 20 mm, but preferably only 3 to 10 mm are subjected to strong pressure and shear. The limitation of the structural changes to this depth of possible deviations from the nominal length and width dimensions does not lead to noticeable changes in the service properties of the 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.

Where appropriate, the elastification can be limited to one of the opposing cut surfaces and / or longitudinal surfaces if, when laying the roof insulation panels, an elastified and a non-elasticized lateral surface are placed against each other. 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 Seiten-ansicht 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.

FIG. 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 well-known, not shown devices of a production plant following a curing oven and a cross-saw, with an unspecified endless secondary nonwoven after curing of a binder contained in the secondary web into individual sections, which is subsequently subdivided still 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 (FIG. FIG. 3 ) and two cut surfaces 4 and two longitudinal surfaces 5. 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.

Production reasons, the roof insulation panels 1 according to FIG. 1 formed obliquely, so that for a proper and thermal bridge-free processing of such roof insulation panels 1 in the range of flat or inclined roofs from these oblique roof insulation panels 1 perpendicular roof insulation panels 1 must be made. 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.

In the FIG. 1 For this purpose, the device shown has a stop 10 arranged in the conveying path 9 which is aligned at right angles 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 in a position relative to the conveying path 9 adjustable to the extent that it protrudes in an upper position in the conveying path 9 and after alignment of the rising 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 colinearly. 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 board 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 or perpendicular thereto is not possible.

In the present embodiment according to FIG. 1 the roof insulation board 1 is guided past the stationary arranged milling 11. Alternatively, however, it can be provided that the roof insulation board 1 in the in FIG. 1 shown position stopped and the milling 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 board 1 is in FIG. 2 shown. It can be seen that the roof insulation panel 1 according to FIG. 1 deviating from the skewness of the roof insulation panels 1 in FIG. 1 now has right angles between the cut 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 board 1 according to FIG. 2 takes place by means of a movement of the milling 11 perpendicular to the conveying path 9, wherein the frequency of movement of the milling 11 in combination with the conveying speed of the roof insulation board 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 11 are formed identically to achieve an identical waveform 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 on the formation of a closed insulating layer on a flat roof or inclined flat 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 in deflection of 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 board 1 is in FIG. 4 shown. In this embodiment, the roof insulation panel 1 it can be seen that the mineral fibers 7 in the production direction, ie in the conveying direction 6 have a flat storage within the roof insulation board 1, while they have transverse to the conveying direction 6 has a steep storage.

In addition to the regarding the Figures 2 and 3 described processing of the longitudinal surfaces 5 is in accordance with the embodiment of the roof insulation board 1 FIG. 4 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, one of the cutter 11 downstream pressure roller (not shown) may be provided, which is formed serrated and the longitudinal surface 5 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 device according to the invention are always used when 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 (44)

1. A method for the manufacture of roof insulating boards (1) made of mineral fibres, preferably rock wool, in which mineral fibres are produced from a silicious melt and are deposited with a binding and/or impregnating agent on a continuous conveyor (9) as mineral fibre sheet, the mineral fibre sheet is supplied to mechanical treatments, such as longitudinal and transverse compressions, and to a hardening furnace and is afterwards divided into roof insulating boards (1) along cut surfaces (4),
   characterized in that
   the roof insulating boards (1) are aligned both in their longitudinal extension and their transverse extension which is rectangular with respect to the longitudinal extension in positional accuracy on a conveyor and are afterwards supplied to a trimming operation and/or calibration of at least their longitudinal faces (5, 5').
2. A method according to claim 1,
   characterized in that
   the roof insulating boards (1) are clamped between two compression strips (14) which rest upon the large surfaces (2, 3) of the boards at least when being trimmed.
3. A method according to claim 1,
   characterized in that
   the trimming is carried out by means of at least two milling cutters (11), grinding belts, grinding rolls and/or saws which are placed on both sides of the conveyor and which can be preferably adjusted with respect to their distance between each other.
4. A method according to claim 1,
   characterized in that
   the cut surfaces (4) of the roof insulating boards (1) are aligned in a right angle with respect to the longitudinal direction of the conveyor.
5. A method according to claim 1,
   characterized in that
   after the trimming of the longitudinal faces (5, 5') the roof insulating boards (1) are turned by 90° and supplied to a trimming of the cut surfaces (4).
6. A method according to claim 1,
   characterized in that
   the roof insulating boards (1) are manufactured with longitudinal faces (5, 5') and/or cut surfaces (4) presenting an excess dimension comprised between 3 and 25 mm, especially between 3 and 10 mm, and are supplied to the trimming.
7. A method according to claim 1,
   characterized in that
   the roof insulating boards (1) are moved with respect to their alignment against a stop (10) extending in a right angle to the direction of transport (6), which stop is located in the transport path (9) and can be lifted and made sink in, and are pushed against said stop (10) such that the cut surface (4) which is placed in front in the direction of transport (6) comes to an all-over bearing on it.
8. A method according to claim 7,
   characterized in that
   the required alignment of the roof insulating boards (1) will be determined by pressure sensors installed in the stop (10).
9. A method according to claim 1,
   characterized in that
   the roof insulating boards (1) are moved into the alignment required for the trimming operation by means of preferably hydraulically and/or pneumatically driven manipulators which are located on the side of the transport path (9).
10. A method according to claim 3,
    characterized in that
    the roof insulating boards (1) are moved along the milling cutters (11) or the milling cutters (11) are moved along the roof insulating boards or the movements of the roof insulating boards (1) and milling cutters (11) are combined.
11. A method according to claim 3,
    characterized in that
    the milling cutters (11), grinding belts, grinding rolls and/or saws mill corresponding recesses (20) and projections (19) into opposite surfaces (4, 5, 5') of the roof insulating boards (1).
12. A method according to claim 3,
    characterized in that
    the distance of the milling cutters (11), grinding belts, grinding rolls and/or saws is adjusted by means of a laser measuring unit, preferably in dependence on a computer supported task management.
13. A method according to claim 1,
    characterized in that
    the longitudinal faces (5, 5') and/or cut surfaces (4) are calibrated and configured in an undulated form or in another geometric configuration which enables the toothing of adjacent roof insulating boards (1).
14. A method according to claim 1,
    characterized in that
    incisions and/or recesses, such as for example grooves having a depth of maximum 5 mm, preferably of 2 mm, which essentially extend in parallel to the large surfaces (2, 3) of the roof insulating boards (1) are realized in the longitudinal faces (5, 5') and/or cut surfaces (4) for elasticizing the side face areas of the roof insulating boards (1).
15. A method according to claim 1,
    characterized in that
    profiles are incorporated, in particular milled and/or grinded into the longitudinal faces (5, 5') and/or cut surfaces (4) over the height of the roof insulating boards for elasticizing the side face areas of the roof insulating boards (1).
16. A method according to claim 1,
    characterized in that
    the longitudinal faces (5, 5') and/or cut surfaces (4) are loaded with pressure and/or shear via a roller for elasticizing the side face areas of the roof insulating boards (1).
17. A method according to claim 16,
    characterized in that
    an area of up to 20 mm, preferably between 3 and 10 mm, in the direction of the surface normal of the longitudinal faces (5, 5') and/or cut surfaces (4) is elasticized, preferably by means of a toothed roller.
18. A method according to claim 16,
    characterized in that
    the elastification of the longitudinal faces (5, 5') and/or cut surfaces (4) is locally limited, especially by means of the thickness of the roof insulating boards (1).
19. A method according to claim 16,
    characterized in that
    only one of the opposite longitudinal faces (5, 5') and/or cut surfaces (4) is elasticized.
20. Roof insulating boards (1) made of mineral fibres provided with binding and/or impregnating agents, preferably made of rock wool, comprising two large surfaces (2, 3) placed in parallel and spaced from each other which are connected to each other via two cut surfaces (4) and two longitudinal faces (5, 5'), wherein the cut surfaces (4) are aligned in a right angle with respect to the longitudinal faces (5, 5') and the longitudinal faces (5, 5') as well as the cut surfaces (4) are aligned in a right angle with respect to the large surfaces (2, 3),
    characterized by
    a maximum deviation in width of ± 0.5 to 1 mm and/or a maximum oblique-angled state of the cut surfaces (4) with respect to the longitudinal faces (5, 5') of 0.5 to 1 mm referred to a length of 1 m.
21. Roof insulating boards according to claim 20,
    characterized in that
    the cut surfaces (4) and/or longitudinal faces (5, 5') are designed with recesses (20) and/or projections (19), such that adjacent cut surfaces (4) and/or longitudinal faces (5, 5') interlock in a sealing manner.
22. Roof insulating boards according to claim 21,
    characterized in that
    the recesses (20) and/or projections (19) enable an at least limited swiveling mobility of the adjacent longitudinal faces (5, 5') and/or cut surfaces (4) with respect to each other.
23. Roof insulating boards according to claim 20,
    characterized in that
    the recess (20) are concave and the projections (19) are correspondingly convex.
24. Roof insulating boards according to claim 20,
    characterized in that
    the cut surfaces (4) and/or longitudinal faces (5, 5') comprise wave-shapes in the longitudinal direction, which wave-shapes are correspondingly configured on opposite cut surfaces (4) and/or longitudinal faces (5, 5') such that in the area of a wave loop (16) of a cut surface (4) and/or a longitudinal face (5, 5') a corresponding wave through (17) is formed in the opposite cut surface (4) and/or longitudinal face (5, 5').
25. Roof insulating boards according to claim 20,
    characterized in that
    at least one of the cut surfaces (4) and/or longitudinal faces (5, 5') comprises a zone (22) which is made compressible preferably by means of an elastification and/or a special fibre alignment.
26. Roof insulating boards according to claim 25,
    characterized in that
    the compressible zone (22) extends over the entire length of the cut surface (4) and/or longitudinal face (5, 5').
27. Roof insulating boards according to claim 25,
    characterized in that
    the compressible zone (22) comprises a depth of up to 20 mm, especially comprised between 3 and 10 mm.
28. Roof insulating boards according to claim 25,
    characterized in that
    the compressible zone (22) is divided into different areas which are arranged in a distributed manner over the height of the cut surfaces (4) and/or the longitudinal faces (5, 5').
29. Roof insulating boards according to claim 20,
    characterized in that
    the cut surfaces (4) comprise an elastification which is different from the one of the longitudinal faces (5, 5'), preferably a low elastification in case of flat laid mineral fibres (7).
30. Roof insulating boards according to claim 20,
    characterized in that
    the cut surfaces (4) and/or longitudinal faces (5, 5') comprise at least one, preferably more incisions and/or recesses which extend in particular in parallel to the large surfaces (2, 3).
31. Roof insulating boards according to claim 29,
    characterized in that
    the incisions and/or recesses comprise a width of maximum 2 mm.
32. A device for the manufacture of roof insulating boards (1) made of mineral fibres provided with binding and/or impregnating agents, preferably made of rock wool, comprising two large surfaces (2, 3) placed in parallel and spaced from each other which are connected to each other via two cut surfaces (4) and two longitudinal faces (5, 5'), wherein the cut surfaces (4) are aligned in a right angle with respect to the longitudinal faces (5, 5') and the longitudinal faces (5, 5') as well as the cut surfaces (4) are aligned in a right angle with respect to the large surfaces (2, 3), and for carrying out the method according to claim 1, comprising a transport path (9), preferably at least one continuous conveyor on which the roof insulating boards (1) are supplied to a packaging station,
    characterized in that
    a stop (10) is placed in the transport path (9) which can be brought into said transport path (9) and which is aligned in a right angle with respect to the direction of transport, and that a device for the cutting and/or chip removing treatment of the lateral faces (4, 5, 5') of the roof insulating boards (1) which essentially extend in parallel to the direction of transport (6) is placed downstream of the stop (10).
33. A device according to claim 32,
    characterized in that
    the stop (10) comprises pressure sensors which detect a desired alignment of the arriving roof insulating board (1) and transmit it to a control system of the stop (10).
34. A device according to claim 32,
    characterized in that
    pushing elements are placed on both sides of the transport path in the area of the stop (10), which pushing elements align the roof insulating board (1) that arrives at the stop (10).
35. A device according to claim 32,
    characterized in that
    the device for the cutting and/or chip removing treatment of the lateral faces (4, 5, 5') of the roof insulating boards (1) which essentially extend in parallel to the direction of transport (6) consists of at least two rotationally symmetrical milling cutters (11) which are placed on both sides of the transport path (9).
36. A device according to claim 35,
    characterized in that
    grinding devices which are treating the lateral faces (4, 5. 5') of the roof insulating boards (1) are placed downstream of the milling cutters (11) and/or saws are placed upstream of the milling cutters (11).
37. A 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 their distance from the transport path (9) can be adjusted and/or they can be moved in parallel to the transport path (9).
38. A device according to claim 35,
    characterized in that
    the milling cutters (11) comprise different designs of their milling surfaces (12).
39. A device according to claim 38,
    characterized in that
    the milling surfaces (12) are designed such that they mill corresponding recesses (20) and projections (19) into opposite lateral faces (4, 5, 5') of the roof insulating boards (1).
40. A device according to claim 38,
    characterized in that
    one milling surface (12) comprises a concave surface shape and the second milling surface (12) comprises a corresponding convex bulging.
41. A device according to claim 32,
    characterized in that
    compression strips (14) which rest upon the large surfaces (2, 3) of the roof insulating boards (1) are placed in the area of the device for the cutting and/or chip removing treatment of the lateral faces (4, 5, 5') of the roof insulating boards (1) which essentially extend in parallel to the direction of transport (6).
42. A device according to claim 32,
    characterized in that
    at least one preferably toothed press roller which acts upon the lateral faces (4, 5, 5') of the roof insulating boards (1) for elasticizing at least partial areas of the lateral faces (4, 5, 5') is placed downstream of the device for the cutting and/or chip removing treatment of the lateral faces (4, 5, 5') of the roof insulating boards (1) which essentially extend in parallel to the direction of transport (6).
43. A device according to claim 32,
    characterized in that
    at least one cutting tool which cuts incisions and/or recesses which are aligned in parallel to the large surfaces (2, 3) into the lateral faces (4, 5, 5') of the roof insulating boards (1) is placed downstream of the device for the cutting and/or chip removing treatment of the lateral faces (4, 5, 5') of the roof insulating boards (1) which essentially extend in parallel to the direction of transport (6).
44. A device according to claim 32,
    characterized in that
    a turning station is placed downstream of the device for the cutting and/or chip removing treatment of the lateral faces (4, 5, 5') of the roof insulating boards (1) which essentially extend in parallel to the direction of transport (6) and another device for the cutting and/or chip removing treatment of the lateral faces (4, 5, 5') of the roof insulating boards (1) which essentially extend in parallel to the direction of transport (6) is arranged downstream of the turning station, such that all four lateral faces, namely the cut surfaces (4) and the longitudinal faces (5, 5') of the roof insulating boards (1) can be worked.

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