WO2009043492A2

WO2009043492A2 - Method and apparatus for the production of insulating elements

Info

Publication number: WO2009043492A2
Application number: PCT/EP2008/007947
Authority: WO
Inventors: Peter Nowak
Original assignee: Deutsche Rockwool Mineralwoll Gmbh & Co. Ohg
Priority date: 2007-09-27
Filing date: 2008-09-20
Publication date: 2009-04-09
Also published as: WO2009043492A3; DE102007046100A1

Abstract

The invention relates to a method for producing insulating elements. In said method, a web (1) of insulation material is subdivided into strip-shaped sections (6) by means of mechanically performed cuts. In order to devise a method for producing insulating elements which allows high-quality lamellae, especially made of mineral fibers, to be produced economically without creating deformations and thus tolerances in the thickness of the material, angularity, and surface properties, several cuts are simultaneously performed in a locally staggered manner in the cutting direction within the web (1) of insulation material.

Description

Method and device for the production of insulating elements

The invention relates to a method for the production of insulating elements, in particular for the thermal and / or acoustic insulation of building exterior surfaces, preferably of mineral fibers, in which an insulating material web is divided by mechanically executed cuts in strip-shaped sections. Furthermore, the invention relates to a device for the production of insulating elements, in particular for the thermal and / or acoustic insulation of building exterior surfaces, preferably made of mineral fibers, with a device for promoting an insulation web and arranged in the region of the cutting device with which the insulation web by cuts in strip-shaped sections is divisible.

Insulating elements are made of different materials. For example, insulating elements made of polystyrene foam are known. In addition, insulating elements are made of glassy solidified mineral fibers, which are distinguished by the chemical composition in commercial glass wool and rock wool insulation materials. Both varieties differ in the chemical composition of the mineral fibers. The glass wool fibers are made from silicate melts containing high levels of alkali and boron oxides which act as fluxes. These melts have a wide processing range and can be drawn out into relatively smooth and long mineral fibers by means of rotating bowls whose walls have holes, which are at least partially bonded, at least in part, with mixtures of thermosetting phenol-formaldehyde and foam resins. The proportion of these binders in the insulating elements of glass wool is about 5 to about 10% by mass and is also limited by the fact that the character of a non-combustible insulating element is to be preserved. The binding of the mineral fibers can also be done with thermoplastic binders such as polyacrylates. The impregnated with binders and other additives mineral fibers are collected as insulation sheet of mineral fibers on a slow-running device for promoting the insulation web. Here, the mineral fibers are oriented in a plane largely directionless and store extremely flat on top of each other. By slight vertical pressure, the insulating web is compressed to the desired thickness and the conveying speed of the means for promoting the insulation web at the same time to the required density. The binder contained in the insulation sheet is cured in a hardening furnace by means of hot air, so that the structure of the insulation sheet is fixed.

In the production of insulating elements made of rock wool fibers impregnated mineral fibers are collected as thin as possible and lightweight mineral fiber fleece, a so-called primary fleece and carried away at high speed from the field of the fiberization device. From the primary nonwoven an endless mineral fiber web is built, which has a uniform distribution of mineral fibers.

The primary nonwoven consists of relatively coarse fiber flakes, in the core areas of which higher binder concentrations may be present, while weaker or even non-bonded mineral fibers predominate in the edge areas. The mineral fibers are aligned in the fiber flakes approximately in the transport direction.

Rock wool insulation elements have binder contents of about 2 to about 4.5% by weight. With this small amount of binders, only part of the mineral fibers are in contact with the binder. The binders used are predominantly mixtures of phenol, formaldehyde and / or urea resins. Some of these resins are already substituted by polysaccharides. Inorganic binders are used as for the insulation elements made of glass wool only for special applications of insulating elements, as these are much brittle than the largely elastic to plastic plastic reacting organic binder, which accommodates the desired character of the insulating elements made of mineral fibers as elastic-resilient building materials. The additives used are mostly high-boiling mineral oils in proportions of 0.2% by mass, in exceptional cases also about 0.4% by mass.

Usually, the primary nonwovens are deposited by means of a pendulum-suspended conveyor across another device for promotion, which allows the production of an existing from a variety of obliquely superimposed individual layers endless insulating material web. By a horizontally directed in the conveying direction and at the same time vertical compression, the insulating material web can be folded more or less intense. From this insulating material webs, namely both the insulating material webs of glass wool, as well as the insulating material webs of rock wool strip-shaped sections are produced, which are referred to as lamellae and are used for example for lamellar plates and lamellar webs.

Slats are usually 5 mm to 500 mm wide insulation elements, which are separated in the conveying direction or transversely to the conveying direction of the insulating material web. The mineral fibers in the slats are aligned at right angles to cut surfaces, which form the large surfaces of the slats, which are applied to large surfaces usually when using such slats in the thermal and / or acoustic insulation of building exterior surfaces at least on the building exterior.

Slats can have gross densities of about 60 kg / m ³ and are therefore suitable as tensile and pressure resistant insulating elements on building exterior surfaces and can be glued to these building exterior surfaces and then plastered with a proven plaster layer. Such insulation is referred to as a thermal insulation composite system. The pressure-resistant lamellae are sufficiently flexible in the longitudinal direction in order to be able to be glued on curved building exterior surfaces. At the same time, the slats are still so compressible at right angles to the side surfaces that deviations from the respective length and width (dimensional tolerances) between the individual slats can be compensated with a small contact pressure. This can be used to produce joint-tight insulation layers. Several lamellae can also be assembled into lamella plates or lamellar sheets, wherein the lamellae are either glued together or connected to one another via a lamination.

The production of insulating elements in the form of slats takes place in different ways. All methods have in common that the lamellae are separated by disc from an insulating material web produced in the usual way. This production of lamellae is technically complex and generally leads to a lower throughput speed of the production equipment used for the production of insulating elements. An economical method for the production of insulating elements with the characteristic of lamellae, lamellar plates or lamellar orbits orientation of mineral fibers is described in EP 0 741 827 B1. In this method, a thin primary nonwoven is unfolded by an up and down moving conveyor and placed endlessly and looped on a second conveyor. This creates individual layers that are pressed together in a horizontal direction and compressed. For this purpose, the primary fleece is guided between two pressure-resistant bands, which initially limit only the height of the primary fleece. Already hereby, the mineral fibers in the arcuately deflected paths of the primary web parallel to Aligned boundary surfaces. In order to obtain further flat surfaces, the primary nonwoven can be actively compressed in the vertical direction.

This alignment of the mineral fibers in the primary nonwoven can be done in a separate device, but is advantageously made in conjunction with a curing oven in which the endless insulation web between two pressure belts, of which at least one is movable in the vertical direction, is flowed through with hot air in the vertical direction. The pressure belts have pressure-resistant elements with holes in which surface regions of the insulating material web press in, whereby the surfaces are profiled. In the two surfaces of the insulation web may lead to a further alignment of the mineral fibers, a further compression compared to the underlying areas and possibly to a slight binder enrichment.

An insulating material web produced in this way can subsequently be divided into strip-shaped sections in the conveying direction or transversely thereto.

From the prior art it is known to cut the insulating material web in its longitudinal direction and thus in its conveying direction by a plurality of mutually spaced on a drive shaft saw blades into a plurality of equal width elements, which are referred to as slats and used. Moreover, it is known to cut the insulating material transversely to the conveying direction and thus transversely to the longitudinal direction with a saw blade into individual sections, wherein the width of the sections is adjusted by the feed of the insulating material web in the conveying direction. As an alternative to saw blades, which are driven in rotation, knife bars or saw blade gates can be used.

The quality of the manufactured elements in this process depends heavily on the cutting elements used. In the known methods for producing insulation elements with the above-mentioned cutting elements dusty surfaces in the area of the elements, for example, reduce the adhesion of such elements in a Klebemörtelbett. In addition, in the above-mentioned methods, elements which have shapes which deviate from the ideal shape of a body which is cuboid in cross section by means of cutting tolerances are formed. During the process, the individual elements are compressed, so that this also affects the advantageous embodiment of an element and thus can not be fully utilized.

These problems can be counteracted, at least in part, by using thinner knives, which are also smooth. To the usability of this Ensuring knives over a long period of operation and making these knives of thin material at the same time requires special and costly methods of making such knives. Nevertheless, such blades or saw blades tend to deformation and thus to higher tolerances with respect to the angularity and the material thickness of the elements. In order to exclude or at least reduce these problems, it is known to arrange two cutter bars opposite one another, so that the knives can be used with greater material thickness, but penetrate into the insulating material web with a smaller cutting area. Here, the problem has shown that an offset of the oppositely arranged blades of the cutter bar can lead to tolerances of the material thickness of the elements and to a step formation.

These elements or slats are used as lamellar plates or lamellar sheets, for example in sandwich panels, which have a core of lamellae. Especially in these products, tolerances in thickness, angularity and moreover dusty surfaces lead to adhesion problems, to a reduction in the load-bearing capacity of the sandwich panel and to irregular surfaces of the sandwich panel, so that they can not be used in the desired manner.

The methods described above are particularly for cuts in Förderbzw. Applied longitudinal direction of an insulating material web.

To distinguish these are cuts transversely to the conveying direction of the insulation web. In this method, only a saw blade or a knife is generally used, which is guided transversely to the conveying direction to the insulating material web. The width of the slats cut in this case depends primarily on the conveying speed of the insulating material web, wherein slight changes in the conveying speed already have great effects on the width tolerances of the cut slats. In addition, a non-orthogonal orientation of the conveying direction of the insulating material web to the movement path of the cutting element leads to slats, which differ from the desired geometry of such slats.

German patent application DE 44 19 044 A1 discloses a method and apparatus for producing an insulation structure wherein a plurality of mineral fibers are moved along a conveyor belt system after being cut to a desired size. A larger side portion is moved in a direction that is generally perpendicular to that of the subsequent portions, while the larger side remains in a plane that is parallel to the plane of the larger side of the succeeding portion. A large number of individual sections are covered by a Encapsulation assembly in which they are assembled and covered to form an insulation structure. European Patent Application EP 0 044 550 A1 discloses an apparatus and a method for dividing a panel of chipboard material. According to this method, a plate for immediately separating plate pieces or initiating the separation with subsequent completion elsewhere in the splitting direction relative to at least one thin-walled, smooth-edged, circular, rotating metal blade is moved, the metal blade without cutting until a predetermined penetration depth in the Plate material is pressed without accumulating chips or other particulate waste. The plate passes in pairs simultaneously attacking at its top and bottom metal blades, which are each arranged on shafts.

Starting from this prior art, the invention is based on the object to provide a method and an apparatus for producing insulating elements, with or with the economical production of high-quality lamellae, in particular of mineral fibers while avoiding the disadvantages of the prior art described above the technology is possible.

The solution of this problem provides, in a method according to the invention, for a plurality of cuts in the cutting direction to be made locally offset in the insulating material web at the same time.

On the part of the device according to the invention, this cutting object is provided with the cutting device having at least two cutting elements which are arranged locally offset in the conveying direction of the insulating material web above and / or below the device for conveying the insulating material web.

According to the invention it is thus provided that an insulation web is divided with several cuts in the cutting direction in strip-shaped sections, wherein the cuts are performed locally offset in the insulating material web. By locally displacing the cuts in the cutting direction, the advantage is achieved that the individual sections are not compressed by the cutting elements transversely to the conveying direction during cutting. As a result of this configuration, the sections can slightly move away from the insulating material web immediately after the cut, since sections are not clamped between two adjacently arranged cutting elements.

The method according to the invention thus provides that several cuts with a plurality of cutting tools arranged at a spacing from one another in the cutting direction are executed temporally simultaneously but offset locally in the insulating material web in the cutting direction. The cuts can be arranged such that they are simultaneously executed over a length of insulating material extending in the longitudinal direction, wherein the insulating material web is at least partially, but in particular completely divided into sections with the cutting tools, which already match their dimensions with fins , so that in the end only one cut has to be made transversely to the conveying direction in order to subdivide the strip-shaped sections into products ready for sale, namely lamellae.

It has proven to be advantageous to perform the cuts in the longitudinal direction of the insulating material web. But it is also possible to perform the cuts at right angles or at an angle <180 ° to the longitudinal direction of the insulating material web.

In this context, it has proved to be advantageous to align the longitudinal direction of the insulating material web parallel to the conveying direction of the insulating material web.

According to a further feature of the invention it is provided that the insulating material web is moved relative to fixed in the conveying direction cutting tools. Of course, it is also possible to make the cutting device movable with the cutting tools, so that the cutting device is moved relative to a fixed insulating material web. However, since the production of such insulating elements is usually a continuous process in which, for example, in the case of mineral fibers, a mineral melt is formed and defibered and the resulting fibers are continuously deposited on a conveyor, it has proven to be advantageous, the insulating material formed therefrom continuously conveyed, so that the cutting tools and thus the cutting device can be arranged stationary in the conveying path.

The cuts are in this case carried out after passing through the insulating material web by a curing oven, since the insulating material web is fixed in this curing oven in terms of their outer contour.

It has also proved to be advantageous to divide the insulating material web into a plurality of strip-shaped sections, wherein at least one first strip-shaped section arranged in the conveying direction is separated with a first cutting device, whereupon a second section adjacent to the first strip-shaped section is separated with a second cutting device , With regard to the number of cutting devices, this method can be adapted to the corresponding insulating material web, so that a continuous separation of the insulating material web into strip-shaped sections takes place according to the invention. A further development of this embodiment of the invention provides that two strip-shaped sections arranged at opposite edges in the insulating material web are simultaneously cut off simultaneously with the first cutting device, whereupon the strip-shaped sections arranged adjacent to the two strip-shaped sections are simultaneously cut off simultaneously with the second cutting device. Thus, it is provided that in each case in the insulating material outer regions are separated simultaneously by two cutting tools of a cutting device before having a second cutting device, which in turn has two cutting tools, which then after the separation of the originally outer regions forming the outer areas after separating these areas Separates areas.

Preferably, the cutting of the insulation web takes place without material discharge.

According to a further feature of the method according to the invention, it is provided that the cuts are made with saw blades which are driven in a rotary manner, knives which are driven in a translatory manner and / or saw blade gates which are driven in a translatory manner. In all cases, it has proven to be advantageous to form the cutting tools used here with the lowest possible material thickness, so that on the one hand only very narrow cuts are formed and on the other hand, the perpendicularity of the slats are not affected. This is also associated with a lower dust load due to, for example, torn out fibers.

In order to adapt the strip-shaped sections to be separated to different product requirements, it is provided according to a further feature of the method according to the invention that the cutting device is designed to be adjustable at right angles to the cutting line.

The device according to the invention is preferably further developed in that the cutting elements are designed as saw blades driven in rotation, blades driven in a translatory manner and / or saw blade gates driven in translation. Furthermore, it is provided according to a further feature of the invention that a plurality of cutting devices successive in the conveying direction are arranged above and / or below the device for conveying the insulating material web, wherein the cutting tools of successive cutting devices in the conveying direction have a reduced distance from one another. This embodiment of the invention is preferably further developed in that the distance between the cutting tools of successive cutting devices is reduced in accordance with the double width of the strip-shaped sections to be separated with the cutting tools. This device cuts with everyone Cutting device two outer strip-shaped sections of the insulating material from. Since these sections are then usually divided by sections perpendicular to the longitudinal axis into individual lamellae and these lamellae are formed equal during a production cycle, the distance between the cutting tools of successive cutting devices corresponding to twice the width of the separated with the cutting elements strip-shaped sections.

It is provided according to a further feature of the invention that n-1 cutting elements are provided, wherein with "n" the number of sections to be separated from the insulating material web is predetermined.If thus the insulating web is divided into five strip-shaped sections, four cutting tools are provided for this purpose For example, the four cutting tools are connected to four mutually parallel drive shafts with the drive shafts spaced equidistant from one another in the conveying direction The cutting tools arranged on the drive shafts are the first starting from the insulating material web in the conveying direction reached cutting tool each offset by a width of the separated strip-shaped portion.

An alternative embodiment of the device provides that each drive shaft has two spaced-apart cutting tools. Adjacent drive shafts in this case have the cutting tools at a reduced distance from each other. In this embodiment, finally, a drive shaft is provided with a single cutting tool, which preferably cuts the insulating material in the middle.

The cutting tools are arranged adjustable in the longitudinal direction of the drive shafts, so that different cutting widths of the sections to be separated are adjustable.

To perform more accurate cuts, it has proven to be advantageous to store the cutting tools at least on one side above or below the device for promoting the insulating material in guides.

Finally, it is provided according to a further feature of the invention that the locally offset in the conveying direction of the insulating material cutting elements are arranged offset so that notch portions of the cutting elements in the conveying direction of the insulating material during cutting not overlapping, preferably at least slightly spaced, for example, with a distance of 5 cm to 50 cm are formed. Further features and advantages of the invention will become apparent from the following description of the accompanying drawings in which preferred embodiments of a device according to the invention are shown. In the drawing show:

1 shows a first embodiment of an apparatus for producing insulating elements in a plan view.

FIG. 2 shows the embodiment of the device according to FIG. 1 in a view; FIG.

3 shows a second embodiment of a device for producing insulation elements in a plan view;

Fig. 4 shows the second embodiment of the device according to FIG. 3 in a view and

Fig. 5 shows the device according to Figure 4 with an alternative embodiment of the cutting tools.

Figure 1 shows an insulating material web 1 in a plan view, which is moved in a conveying direction according to arrow 2. Above the insulating web 1, a cutting device 3 is arranged, which consists of four drive shafts 4, which are aligned at right angles to the conveying direction and to each of which a cutting tool 5 is rotatably attached. The cutting tools 5 are formed as thin circular saw blades and are driven by the drive shafts 4 at high speed.

By means of the cutting tools 5, the insulating material web 1 is divided into sections 6, which are then subdivided by a not-shown cutting tool transversely to the conveying direction according to arrow 2.

From Figure 1 it can be seen that the insulating material web 1 is divided into five sections 6, and that four cutting tools 5 are provided for this purpose. These cutting tools 5 are arranged locally offset from one another both in the conveying direction according to arrow 2 and transversely to the conveying direction according to arrow 2. In the conveying direction of the insulation web 1, the cutting tools are arranged locally offset from one another that incision regions 7 of the cutting tools 5 are spaced apart in the conveying direction of the insulating material web 1, wherein between the incision regions 7 arranged on adjacent drive shafts 4 cutting tools 5, a distance is maintained substantially the diameter of a cutting tool 5 matches.

It can be seen that in the conveying direction according to arrow 2 moving insulation web 1 with their end 8 reaches a first cutting tool 5, which is eccentrically arranged on the drive shaft 4, that a first edge-side portion 6 of the insulating material web

I am cut. In the following, the insulating material web 1 reaches the second, adjacent to the first cutting tool 5 arranged cutting tool 5, whose distance from the first cutting tool 5 corresponds to the distance between the first cutting tool 5 and a side edge 9 of the insulating material 1, so that with the second cutting tool 5, a second section 6 is separated, the width of which coincides with the width of the first separated portion 6.

Subsequently, the insulating material web 1 reaches with its front end region 8 a third cutting tool 5, whose arrangement in relation to the second cutting tool 5 corresponds to the relation between the first and the second cutting tool 5. The same applies with regard to the fourth cutting tool 5 which subsequently reaches it, which performs a final cut, so that the insulating material web 1 with the four cutting tools 5 is subdivided into five sections 6 of equal width.

In order to vary the widths of the sections 6, the cutting tools 5 along the drive shafts 4 are adjustable. This is shown in FIG. 1 by an arrow 10. The connection between the drive shafts 4 and the cutting tools 5 may be formed positively and / or frictionally engaged. For example, the drive shaft 4 may have a profiling, not shown, in the form of a projection, whereas the cutting tool 5 has a central bore with the diameter of the drive shaft 4, which bore at the appropriate location has a recess for the projection of the drive shaft 4. Of course, there is also the possibility that the drive shaft 4 has a recess and the cutting tool 5 in the region of its bore has a projection which is formed corresponding to the recess of the drive shaft 4.

According to FIG. 2, which shows the device according to FIG. 1 in an enlarged view, the cutting tools 5 are each below the insulating material web 1 in a guide

I led. These guides 11 have the advantage that vibrations of the cutting tools 5 are minimized at right angles to the conveying direction according to arrow 2, so that the sections 6 are cut with a constant cross section.

In the embodiment of a device for the production of insulating elements shown above, the essential advantage is that the sections 6 are movable transversely to the conveying direction according to arrow 2 immediately after the separating cut, so that no compression is exerted on the sections 6 by subsequently penetrating cutting tools 5 , what compression in terms of the cutting result is disadvantageous.

This advantage also applies to the embodiment of the apparatus according to FIGS. 3 and 4 described below. In FIGS. 3 and 4, the construction elements corresponding to the construction elements of the embodiment according to FIGS. 1 and 2 are provided with identical reference numbers.

In contrast to the embodiment according to Figures 1 and 2, the embodiment according to Figures 3 and 4, five drive shafts 4, wherein four drive shafts 4 each have two cutting tools 5 and the last drive shaft 4, a cutting tool 5, with the insulating material web 1 in the conveying direction is cut centrally according to arrow 2.

It can be seen that the cutting tools 5 of the drive shafts 4 are arranged at different distances to the side edges 9 and 12, wherein the distances of the two cutting tools 5 are each a drive shaft 4 to the side edges 9 and 12 identical.

Me the device according to Figures 3 and 4, the insulating material web 1 is divided into the sections 6, wherein the first of the insulating material 1 cutting tools 5 on the first drive shaft 4 on the outside, that is to the side edges 9 and 12 next to a respective portion. 6 is separated, whereupon the insulating web 1 then reaches the cutting tools 5 of the second drive shaft 4 and then with these cutting tools 5, the next two outer sections 6 are separated. This procedure then continues until the insulating material web 1 finally reaches the last drive shaft 4, which has only one cutting tool 5, with which the remaining region of the insulating web 1 is finally subdivided into two sections 6.

From the foregoing, it can be seen that with the devices according to Figures 1 and 2 or 3 and 4 in a simple and economical way insulation elements can be produced, which are particularly suitable for the thermal and / or acoustic insulation of building exterior surfaces, the Insulating elements strip-shaped sections 6 of an insulating material web 1, which can be processed in a simple manner to slats. These devices are suitable for carrying out a method according to the invention, which allows economic production in order to obtain the greatest possible degree of agreement with regard to the geometry, avoiding excessive dust exposure during the production process. FIG. 5 shows an alternative embodiment of the cutting tools 5 of the cutting device 3 according to FIG. The cutting tools 5 according to FIG. 5 differ from the cutting tools 5 according to FIG. 4 in that they have chamfered cutting surfaces 13.

It can be seen that the chamfered cutting surfaces 13 of the cutting tools 5, which are arranged on the right of a central cutting tool, have a bevel, which are aligned with the side edge 9, whereas the cutting tools 5, which are arranged on the left of a central cutting tool 5, have a chamfer , which are aligned to the side edge 12. In the case of the cutting tools 5 formed in circular saw blades, the chamfered cutting surfaces 13 are limited to the outer circumferential surface region of the cutting tools 5. The central cutting tool 5 is designed in accordance with the cutting tools according to FIG. 4, so that chamfered cutting surfaces 13 are provided on both sides.

LIST OF REFERENCE NUMBERS

1 insulating material web

2 arrow

3 cutting device

4 drive shaft

5 cutting tool

6 section

7 Cutting area end side edge

10 arrow

11 Guide 2 Side edge 3 Cutting surface

Claims

claims

1. A process for the preparation of insulating elements, in particular for the thermal and / or acoustic insulation of building exterior surfaces, preferably of mineral fibers, in which an insulating material web is divided by mechanically executed cuts in strip-shaped sections, dad u rch n ke I net, that at the same time several cuts in the cutting direction locally offset in the

Insulation web (1) are executed.

2. Method according to claim 1, characterized in that the cuts are made in the longitudinal direction of the insulating material web (1).

3. The method of claim 1, dad u rch geken nzeich net that the cuts are perpendicular or at an angle <180 ° to the longitudinal direction of the insulating material web (1) are executed.

4. The method according to claim 1, characterized in that the longitudinal direction of the insulating material web (1) is aligned parallel to the conveying direction of the insulating material web (1).

5. The method according to claim 1, characterized in that the insulating material web (1) is moved relative to cutting tools (5) fixed in the conveying direction.

6. The method according to claim 1, characterized in that the insulating material web (1) is subdivided into a plurality of strip-shaped sections (6), wherein at least one first strip-shaped section (6) arranged peripherally in the conveying direction is provided with a first cutting device (5). is separated, whereupon with a second cutting device (5) a second strip (6) arranged adjacent to the first strip-shaped section (6) is severed.

7. Method according to claim 6, characterized in that with the first cutting device (5) two strip-shaped sections (6) arranged at opposite edges in the insulating material web (1) are simultaneously cut off at the same time, whereupon the second cutting device (5) the strip-shaped sections (6) arranged adjacent to the two strip-shaped sections (6) are separated simultaneously in time.

8. The method according to claim 1, characterized in that the cuts are formed without material discharge.

9. The method according to claim 1, characterized in that the sections are formed with rotationally driven saw blades, translationally driven knives and / or translationally driven saw blade gates.

10. The method according to claim 1, characterized in that the cutting device (5) is designed to be adjustable at right angles to the cutting line.

11. An apparatus for producing insulating elements, in particular for the thermal and / or acoustic insulation of building exterior surfaces, preferably made of mineral fibers, with a device for promoting an insulation web and at least one disposed in the region of the cutting device, with the insulating material web by cuts in strip-shaped sections is subdivided, characterized in that the cutting device (3) at least two cutting tools (5), which are arranged locally offset in the conveying direction of the insulating material web (1).

12. The apparatus according to claim 11, characterized in that the cutting tools (5) are designed as a rotary driven saw blades, translationally driven blades and / or translationally driven saw blade gates.

13. Device according to claim 11, characterized in that a plurality of cutting devices (3) successive in the conveying direction are arranged above and / or below the device for conveying the insulating material web (1), in each case with two cutting tools (5), wherein the cutting tools (5) the successive in the conveying direction cutting means (3) have a reduced distance from each other.

14. The apparatus of claim 13, dad u rch geken nze I net, that the distance between the cutting tools (5) successive cutting devices (3) corresponding to twice the width of the cutting tools (5) to be separated strip-shaped sections (6) is reduced.

15. The device according to claim 11, I nze I net d u rch n-1 cutting tools (5), where n is the number of the insulating material web (1) to be separated sections (6).

16. Device according to claim 11, characterized in that the cutting tools (5) are arranged on drive shafts (4).

17. Device according to claim 16, characterized in that the cutting tools (5) are adjustably arranged in the longitudinal direction of the drive shaft (4).

18. Device according to claim 11, characterized in that the cutting tools (5) are mounted at least on one side above or below the device for conveying the insulating material web (1) in guides (11).

19. Device according to claim 11, characterized in that the cutting tools (5) arranged locally staggered in the conveying direction of the insulating material web (1) are offset in such a way that cutting regions (7) the cutting tools (5) in the conveying direction of the insulating material web (1) during cutting not overlapping, preferably at least slightly spaced, for example, with a distance of 5 cm to 50 cm are formed.

20. The apparatus of claim 11, dad urch geken nzei ch net, that the cutting tools (5) substantially parallel to the conveying direction of

Insulating material web (1) are aligned.

21. Device according to claim 11, characterized in that the cutting tools (5) have one-sided bevelled cutting surfaces (13).

22. Device according to claim 21, characterized in that the bevelled cutting surfaces (13) of all cutting tools (5) are aligned in the same direction in the cutting device (3).

23. Device according to claim 21, characterized in that the cutting device (3) has a plurality of cutting tools (5) with bevelled cutting surfaces (13), of which at least two cutting tools (5) arranged in opposite regions have cutting surfaces (13 ) with opposite orientation.

24. The device according to claim 12, characterized in that the axis of rotation of the cutting tools (5) are arranged above and / or below the means for conveying the insulating material web.