HUT74138A - A method and a plant for producing a mineral fiber-insulated web, and a mineral fiber-insulated plate - Google Patents

Abstract

A method of producing a mineral fiber-insulating web comprises the steps of firstly producing a first non-wowen mineral fiber web. The first mineral fiber web contains mineral fibers arranged generally in the longitudinal direction of the mineral fiber web. Secondly, the first mineral fiber web is moved in the longitudinal direction of the web and folded parallel with the longitudinal direction and perpendicular to the transversal direction of the first mineral fiber web, so as to produce a second mineral fiber web comprising a central body and opposite surface layers sandwiching the central body, which central body contains mineral fibers arranged generally perpendicular to the longitudinal and transversal directions of the second mineral fiber web and which surface layers contain mineral fibers arranged generally in the transversal direction of the second mineral fiber web. Thirdly, a third non-wowen mineral fiber web being a mineral fiber web of a higher compactness as compared to the second mineral fiber web is produced and adjoin in facial contact with the second mineral fiber web for producing a fourth composite mineral fiber web which is thereupon cured. The method also optionally includes longitudinally compressing and/or transversally compressing the second mineral fiber web. The composite mineral fiber web may additionally be combined with additional mineral fiber webs or coverings for producing a composite mineral fiber web product which is cured in a single curing process.

Description

BACKGROUND OF THE INVENTION The present invention relates to a method and a manufacturing arrangement for producing mineral wool insulation material and a mineral wool insulation board. The present invention relates generally to the manufacture of insulating panels of mineral fibers. Mineral fibers include rock, glass, etc. More particularly, the invention relates to a new technique for producing mineral wool insulation material from which mineral wool insulation boards can be cut. The mineral wool insulation sheets made from the mineral wool insulation material of the present invention have favorable mechanical properties such as good modulus of elasticity and strength, low weight and good thermal insulation.

So far, mineral wool insulating materials have generally been made into homogeneous webs, i.e., webs in which the mineral fibers constituting the mineral wool insulation material are predominantly located in one direction, depending on the direction of the production line for the production and delivery of the mineral wool insulation material. The characteristics of a product made from a homogeneous mineral wool insulation material are determined by the aggregate of the mineral wool insulation material, in particular by the bonding of the mineral fibers in the insulating board and by the weight or density of the mineral fibers in the mineral wool insulation board.

Methods to some extent iron out the advantageous properties of mineral wool insulating panels of other structures are known for producing mineral wool insulating panels in which the main direction of mineral fibers is · ·

- 3 spaces from the direction specified by the production line (PCT / DK91 / 0083, International Publication Number WO92 / 10602; US Patent 4950355; Swedish Patent 441764; US Patent Nos. 2546230 and 3493452).

From the above-mentioned patent application WO / 10602 there is known a method for producing a mineral wool insulation sheet consisting of interconnected rod-shaped mineral fiber elements. According to the method, a continuous mineral wool material is cut lengthwise into lamellae, the lamellae are cut to the desired length, the lamellae are rotated 90 ° about the longitudinal axis and a sheet is formed to form a bond between the lamellas. The process also includes a heat treatment ligand applied to either the continuous mineral wool material or the sheet of lamellas of a given length.

No. 441764. A technique is known from the Swedish patent for producing mineral wool insulating panels consisting of rod-shaped elements and is similar to the solution described in the international patent application described above. According to the Swedish patent, a mineral wool material is cut into rods of a certain length, rotated and formed into a composite mineral wool plate in which, in a separate manufacturing step, the rods are bonded with the binder introduced into the openings in the composite mineral wool plate.

• · ·

No. 2546230. A solution is known from the US patent for producing mineral wool boards or sheets consisting of rod-shaped elements. No. 2546230. The technique described in the US patent is very similar to the solutions described in the aforementioned international patent application and the said Swedish patent and includes the step of joining the rod-shaped lamellae with a suitable binder.

No. 3493452. A process is known from U.S. Patent No. 5 for producing a fibrous sheet structure from a polymeric material, e.g. filaments of polyethylene terephthalate or polyhexamethyladithamid

forming a continuous web of polymeric fibers on a web, compressing the web, cutting it into parallel strips, and then rotating the strips 90 ° about their longitudinal axis and re-joining only by relieving the strips of pressure during rotation. Carpets, rugs, bedspreads, bathrobes and the like are manufactured from the material according to the said US patent. They are prepared.

The present invention seeks to provide a novel process for producing mineral wool insulation material from which mineral wool insulation boards can be cut, and to enable the production of a complex and complex structure of mineral wool insulation boards in an online production arrangement having various advantages.

of a homogeneous structure with known mineral wool insulation sheets containing unidirectional fibers.

An advantage of the present invention is that the mineral wool insulation sheet produced by the process of the present invention contains less mineral fibers than known mineral wool insulation sheets and therefore has less expensive but more favorable mechanical and thermal insulating properties.

An essential feature of the present invention is that the mineral wool insulation sheet of the present invention, produced by the process of the present invention, has less mineral content.

the known mineral wool seals having the same mechanical and thermal insulating properties 1, 1, and, thus, the insulating sheet according to the invention are lighter and smaller in volume than the known ones, thereby reducing transport, storage and handling costs.

The above, respectively. the objects, advantages and features described later in the detailed description are achieved by the process of the present invention such that

a) providing a first nonwoven mineral wool material having a first longitudinal direction parallel to its own plane and a second transverse direction parallel to its own plane, said first mineral wool material comprising mainly said second transverse mineral fibers and a first curable binder,

b) moving the first mineral wool material in said first longitudinal direction,

c) folding the first mineral wool material parallel to the first longitudinal direction, perpendicular to the second transverse direction, to form a second nonwoven mineral wool material, the second mineral wool material comprising a central body and the surface layers surrounding the central body on both sides; being substantially perpendicular to the first longitudinal direction and the second transverse direction and substantially transverse to the second layers in the surface layers,

d) moving said second mineral wool material in said first longitudinal direction,

e) providing a third nonwoven mineral wool material defining a third direction parallel to its plane, the third mineral wool material comprising mainly said mineral fibers and a second curable binder, and the third mineral wool material being more dense than the second mineral wool. material,

f) depositing the third mineral wool material on the second mineral wool material to form a fourth composite mineral wool material; and

g) curing the first and second curable binders to form a bond between the mineral fibers of the fourth composite mineral wool material, thereby forming the mineral wool insulation material.

The third non-woven mineral wool material, which is

In step f), the second mineral wool material is combined with a separate mineral wool material. so the first and the third

the mineral wool material can be produced in separate production lines and then combined in step f).

In a first embodiment of the process of the invention, the third nonwoven mineral wool material is prepared by separating a surface layer from the first mineral wool material and compacting said surface layer.

The third mineral wool material may also be formed by folding the surface layer so that the mineral fibers in the third mineral wool material are substantially transverse to the longitudinal direction of the third mineral wool material.

In a further preferred embodiment of the process according to the invention, the third nonwoven mineral wool material is prepared by separating a surface layer of the second mineral wool material formed in step c) from the central body and compacting the surface layer to obtain the third mineral wool material. Since the third mineral wool material is produced by separating the surface layer of the second mineral wool material, the main direction of the mineral fibers in the third mineral wool material will be the same as that of the second mineral wool material, i.e. the fibers will be located substantially in the second transverse direction.

Another embodiment of the process of the present invention comprises a further step similar to step e), wherein a fifth nonwoven mineral wool material is produced which is similar to a third mineral wool material and then a fifth mineral wool material in step f). Is laid on 8 mineral wool material, such that the third and the fifth mineral wool material enclose the second mineral wool material in the fourth mineral wool material. . As a result of the production of a fifth nonwoven mineral wool material, the fourth mineral wool material has an integrated composite structure in which the central body is composed of a second mineral wool material surrounded on two sides by compacted surface layers consisting of third and fifth mineral wool materials.

Folding of the first mineral wool material is preferably accomplished by forming continuous waves in the first longitudinal direction of the first mineral wool material, thereby forming a precisely structured, folded second mineral wool material, from which the surface layer (s) can be easily peeled off.

In the case where the third mineral wool material is produced as surface layers separated from the second mineral wool material, the mineral fibers of the third mineral wool material, as mentioned above, are substantially in the second transverse direction. It follows that the third direction may coincide with the second transverse direction and consequently be perpendicular to the first longitudinal direction.

In the case where the third nonwoven mineral wool material is produced on a separate production line, the third direction may be arbitrary, e.g. it may coincide with the first longitudinal direction and consequently be perpendicular to the second transverse direction.

Another preferred embodiment of the process according to the invention comprises an initial step of producing a first mineral wool material from a nonwoven mineral wool base material, placing the mineral wool raw material in overlapping layers to form a more homogeneous and dense mineral wool material such as the mineral wool raw material in which the mineral fibers are located substantially in the longitudinal direction of the mineral wool raw material. By forming the first mineral wool material from the nonwoven mineral wool material by forming overlapping layers, the characteristic direction of the mineral fibers of the nonwoven mineral wool material is shifted from the longitudinal direction of the mineral wool material to the cross of the first nonwoven mineral wool material. The nonwoven mineral wool base material is preferably arranged in overlapping layers in the second transverse direction.

The aforementioned PCT / DK91 / 00383, published as WO92 / 10602. According to the International Patent Application, the first and second nonwoven mineral wool materials are preferably compacted and compressed to obtain a more compact and homogeneous mineral wool. Compression and compression can be performed in the direction of the material height, longitudinally and transversely, these directions can be combined. Accordingly, the process according to the invention preferably further comprises the step of compressing the first nonwoven mineral wool obtained from the initial nonwoven mineral wool according to step a).

It is further preferred that the process of the invention is

including the longitudinal compression of the first nonwoven mineral wool material produced in step a) and additionally, or instead, the longitudinal compression of the second nonwoven mineral wool material produced in step c). As a result of longitudinal compression, the mineral wool material will be more homogeneous, which will result in improved mechanical properties and, in most cases, will have better thermal insulation properties than longitudinally pressed mineral wool.

It will be apparent from the following detailed description of the preferred embodiments of the invention that the mechanical properties of the mineral wool insulating panels produced according to the invention will be surprisingly improved if the second nonwoven mineral wool fabricated in step c). transverse compression to homogenize the structure of the second nonwoven mineral wool material. Transverse compression of the second nonwoven mineral wool material substantially improves the mechanical properties of the second nonwoven mineral wool insulation sheet, which is due to the fact that the second nonwoven mineral wool material is displaced and transposed during the transverse compression. before curing.

Preferably, the process of the present invention further comprises the step of providing a film on one or both side surfaces of the first nonwoven mineral wool material and / or the second nonwoven mineral wool material. > ♦ · • · «· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ··············································. The film may be made of plastic and may be continuous film, woven or nonwoven, or alternatively, the film may not be of plastic, e.g. made of paper or textile material. The mineral wool insulating material produced by the process of the present invention, as mentioned above, is provided on its two opposite sides with additional mineral wool materials which enclose the central body of the composite mineral wool insulating material. If the mineral wool insulation material is a three-layer structure, one or both outer side surfaces may be provided with a similar or identical surface coating.

The process of the invention may further comprise the step of compressing the fourth composite mineral wool material before curing the binder of the fourth composite mineral wool material. The fourth composite mineral wool material may be compressed in the height, longitudinal and / or transverse direction of the material. Compression of the fourth composite mineral wool material improves the homogeneity of the final product since compression of the fourth composite mineral wool material exerts a homogenizing effect on the central body of the fourth composite mineral wool material, which is the central body of the second nonwoven mineral wool material.

In order to introduce a more homogeneous and dense mineral wool material into the heat treatment furnace in step g), the process of the present invention preferably further comprises the step of: ·· 99 »* · · · · · ···················································································································································································· begins this series of this event to help you.

- 12 coarse mineral wool materials are compacted before being introduced into the heat treatment furnace. Compaction of the fourth composite mineral wool material improves the homogeneity of the end product, since compaction of the fourth composite mineral wool material homogenizes the central body of the fourth composite mineral wool material, which is the central body of the second nonwoven mineral wool material.

The curing of the first and, if used, second and third curable binders in step g) can be accomplished in a variety of ways, depending on the nature of the binder or binders, e.g. simply by curing the curable binder in a curing gas or atmosphere, e.g. air, or radiation, e.g. Exposed to UV radiation or IR radiation. Assuming that the binder or binders are heat-curable, such as resin-based binders commonly used in the mineral fiber industry, the mineral wool material is cured during the curing of the binder or binders in a heat treatment furnace. In this case, the curing is carried out by means of a heat treatment furnace. Curing devices also include IR radiators, microwave radiators, and the like.

The cured mineral wool produced in step g) is made of insulation material, preferably by slicing the cured fourth composite mineral wool material in a separate step.

Slave for the production of mineral wool insulation material13 · · * * * »4 4 4 4 4 4 4 4 · * Horse, already mentioned, or. a manufacturing arrangement according to the invention for further objects, advantages and features:

a) a first means for producing a first nonwoven mineral wool material which defines a first longitudinal direction parallel to its own plane and a second transverse direction parallel to its own plane, the first mineral wool material comprising mainly said second transverse mineral fibers and a first curable binder,

b) a second means for moving said first mineral wool material in said first longitudinal direction,

c) a third device which folds the first mineral wool material parallel to the first longitudinal direction, perpendicular to the second transverse direction, to form a second nonwoven mineral wool material, the second mineral wool material having a central body and two surface layers surrounding the central body; fibers in the central body being substantially perpendicular to the first longitudinal and second transverse directions, and in the surface layers extending substantially perpendicularly to the second transverse direction,

d) a fourth means for moving said second mineral wool material in said first longitudinal direction,

e) a fifth device for producing a third nonwoven mineral wool material defining a third direction parallel to its own plane, the third mineral wool material being located mainly in said third direction; · • ♦ «4» · • · ♦ · »·· ··« ··

- contains 14 mineral fibers and a second curable binder, and the third mineral wool material is denser than the second mineral wool material,

f) a sixth means for producing a fourth composite mineral wool material by laying the third mineral wool material on the second mineral wool material; and

g) a seventh means for curing the first and second curable binders to form a bond between the mineral fibers of the fourth composite mineral wool material, thereby forming the mineral wool sealant.

Preferably, the manufacturing arrangement according to the invention may comprise any of the above-mentioned features of the process of the invention.

The mineral wool insulation sheet of the present invention, which defines a longitudinal direction, and which fulfills the above and further objects, advantages and features, comprises:

a central body of mineral fibers, a surface layer of mineral fibers where the central body and the surface layer are superimposed, the mineral fibers of the central body being arranged to be substantially perpendicular to the longitudinal direction and perpendicular to the surface layer; its fibers are arranged such that they are substantially parallel to the longitudinal direction, the surface layer being denser than the central body, and

the central body fibers and the surface layer of minerals fibers only with hardenable binders are merged into an integrated structure, the cured

Curing is carried out in a single process and the curable binders are already present in the nonwoven mineral wool materials from which the central body and the surface layer are made.

The mineral wool insulation sheet of the present invention preferably has similarly structured surface layers on the two opposite surfaces which encircle the central body in the integrated structure of the mineral wool insulation sheet.

The invention will now be described in more detail with reference to embodiments and drawings.

Figure 1 is a schematic perspective drawing illustrating a first step in the production of mineral wool insulating material by melt-forming;

Figure 2 is a schematic perspective drawing illustrating the compaction of a mineral wool insulation material,

Figures 3, 4, 5 and 6: Schematic perspective drawing illustrating four different solutions for folding a mineral wool insulation material parallel to its longitudinal direction,

Fig. 7: peeling off a top layer of mineral wool insulation material folded according to Figures 3-6 and compacting the top layer,

Figure 8 is a transverse compression of the mineral wool insulating material produced according to Figure 7,

Figure 9 is an overlay of a surface layer, preferably a compacted surface layer, on a mineral wool insulation material, or preferably the remainder of a mineral wool insulation material, from which the surface layer is removed as shown in Figure 7. , the

Figure 10: Curing a mineral wool insulation material and cutting the cured mineral wool insulation material into sheets,

Figure 11 is a perspective view of the folded mineral wool insulation material produced in accordance with Figures 3-6,

Fig. 12 is a perspective view of a first embodiment of a mineral wool insulation board made in accordance with Figures 1-10,

Fig. 13 is a perspective view of a second embodiment of a mineral wool insulation board produced in accordance with Figures 1-10, and Figs. 15 and 17 are diagrams showing the parameters of an online production layout for a general building insulation board made of mineral wool insulation material according to the invention. Figures 14 and 15 are diagrams showing the parameters of an online production layout for the production of heat insulating slabs of mineral wool insulation material according to the present invention.

Figure 1 illustrates the first step of producing a mineral wool insulation material. The first step involves forming the mineral fibers from a melt produced in a furnace 30 and fed from the outlet 32 of the furnace 30 to four rapidly rotating discs 34 in the form of a melt stream 36. To form the mineral fibers, the melt stream 36 is directed radially to the discs 34 and a cooling gas stream is simultaneously directed to the rapidly rotating discs 34 in their axial direction, thereby spraying the resulting mineral fiber spray 38 from the rapidly rotating discs 34. The mineral fiber spray 38 is collected on a continuously operating first conveyor belt 42 and a primary mineral wool insulation material 40 is produced. A thermosetting binder is also added to the mineral wool insulation material, either directly to the primary mineral wool insulation material or at the point when the mineral fibers leave the disks 34, i.e., during the formation of the mineral fibers. As shown in Figure 1, the first conveyor belt 42 has two sections. The first section of the conveyor belt is inclined relative to the horizontal direction and the substantially horizontal second section. The first section forms a collection section, while the second section forms a conveying section for transferring the primary mineral wool insulating material 40 to a second and third continuously operated conveyor belts 44 and 46 which are synchronous with the first conveyor belt 42 and encapsulate the primary mineral wool material 40 on both sides.

Connected to the second and third conveyor belts 44, 46 is a fourth conveyor belt 48 which forms a collecting conveyor on which the secondary minerals 50 · 4 4

Cotton insulation material 4 is collected while the second and third conveyor belts 44, 46 are transversely swinging over the fourth conveyor belt 48 transversely to the longitudinal direction of the fourth conveyor belt 48. The secondary mineral wool insulation material 50 is thus formed by overlapping the primary mineral wool insulation material 40 transversely to the fourth conveyor belt 48.

By forming the secondary mineral wool insulation material 50 from the primary mineral wool insulation material according to Figure 1, a more homogeneous secondary mineral wool insulation material 50 is obtained than the primary mineral wool insulation material.

Note that in the primary mineral wool insulation material 40, the general direction of the mineral fibers is parallel to the longitudinal direction of the mineral fiber insulation material 40 and to the conveying direction of the first conveyor belt 42.

In contrast to the primary mineral wool insulation material 40, the secondary direction of the secondary mineral wool insulation material 50 is substantially transverse and perpendicular to the longitudinal direction of the secondary mineral wool insulation material 50 and the conveying direction of the fourth conveyor belt 48.

Figure 2 shows a station for compacting and homogenizing an inlet mineral wool insulation material 50 'which, by compacting and homogenizing the inlet mineral wool insulation material 50', produces an outgoing mineral wool insulation material 50 which is more dense and homogeneous than mineral wool insulation material. The input mineral wool insulation material 50 'may be a secondary mineral wool insulation material 50 produced at the station shown in Figure 1.

The compression station consists of two stages. The first section comprises two conveyor belts 52 and 54, which are the upper and lower ends of the mineral wool insulation material 50 '. at the lower side surface. In the first section, the inlet mineral wool insulation material 50 'is subjected to high pressure which results in a reduction in the height of the mineral wool insulation material and compaction. The conveyor belts 52 and 54 are positioned so that from their inlet end on the left side of Figure 2, where the mineral wool insulation material 50 'enters the first section, they descend to their outlet end, from where the downwardly compressed mineral wool insulation material is the second stage.

The second section of the compacting station comprises three pairs of rollers consisting of rollers 56 'and 58', 56 and 58 and 56 'and 58'. The rollers 56 ', 56 and 56' are located at the upper side surface of the mineral wool insulation material, while the rollers 58 ', 58 and 58' are located at the lower side surface of the mineral wool insulation material. In the second section of the compacting station, the mineral wool insulation material is longitudinally compressed, whereby the mineral wool insulation material is homogenized, since the mineral fibers of the mineral wool insulation material are rearranged to a more homogeneous structure. In the second section, three pairs of rollers 56 'and 58', 56 and 58, and 56 'and 58' rotate at the same speed, but this speed is lower than the speed of the conveyor belts 52 and 54, which consequently, the mineral wool insulation material is compressed longitudinally. 50 From the compaction station shown in Figure 2, the mineral wool, which is compressed in the vertical and longitudinal direction, exits with insulation material.

It will be appreciated that the compression station of FIG. 2, which applies a combination of height and longitudinal compression, may also be implemented by omitting one of the two sections, i.e., the first section for height compression or the second section for longitudinal compression. . By omitting one of the two sections of the compression station shown in Figure 2, a compression section is performed which performs a single compression or compression operation, i.e., an elevation compression or a longitudinal compression station. Although height compression in the example was performed with conveyor belts and longitudinal compression with rollers, both sections can be formed using conveyor belts or rollers. Thus, the height compression section may include rollers and the longitudinal compression section may include conveyors.

Figures 3, 4, 5 and 6 show four embodiments for longitudinally folding mineral wool insulation material. In Figures 3, 4, 5 and 6, the mineral wool insulation material 50 may be the outgoing mineral wool insulation material according to Figure 2, or alternatively, the mineral fiber wool insulation material shown in Figure 1 may consist of another.

In Figure 3, the mineral wool insulation material 50 is brought into contact with a clamping roller by means of which a continuous film 99 of thermoplastic material is applied to the upper side surface of the mineral wool insulation material 50. The continuous film of thermoplastic material is removed from the roll 98. After the continuous film 99 has been applied to the upper side surface of the mineral wool insulation material 50, the mineral wool insulation material 50, together with the continuous film 99 applied thereto, is forced through the corrugated gate 60 ', which is opposite two corrugated plates 64', 66 ' consisting of a wall, one of which is the wall 62 'shown in the drawing. Obviously, the foil 99 should be so flexible that the foil 99 and the mineral wool insulation material 50 can be folded. The walls sealing the two ends of the corrugated gate 60 'and the waves of the corrugated plates 64' and 66 'narrow from the inlet end of the corrugated gate 60' to the outlet end. When the mineral wool insulation material 50 and the film 99 applied thereto are forced through the corrugated gate 60 ', the mineral wool insulation material is corrugated in the longitudinal direction and a longitudinally corrugated folded mineral wool insulation material 50' is formed.

Figure 4 shows a further embodiment for producing a corrugated and longitudinally folded mineral wool insulation material 50 'from a flat mineral wool insulation material 50. The embodiment of Fig. 4 differs from that of Fig. 3 in that, in contrast to the corrugated gate 60 'shown in Fig. 3, a gate 60 is used which comprises planar plates, one of which is a plate 64 and a curved barrier wall. of which the wall 62 is shown.

Another embodiment of Figure 5 is also suitable for producing a longitudinally folded mineral wool insulation material 50 'from a flat mineral wool insulation material 50. The corrugated and longitudinally folded mineral wool insulation material 50 'is made, as shown in Figure 5, with a gate 50' having rollers and flat walls 62 'at the ends which serve the same purpose as those shown in Figs. Figure 4 shows planar walls 62 ', respectively. the outer edges of the curved walls 62, i.e. the flat mineral wool insulation material 50, are guided during the formation of the corrugated and longitudinally folded mineral wool insulation material 50 '. The gate 60 'comprises a total of eight pairs of rollers, each consisting of one roller disposed on opposite sides of the mineral wool insulation material. Referring now to Figure 5, two of these rollers are designated by reference numerals 68. The rollers are arranged so that they are held together from the inlet end of the gate 60 'to the outgoing end, whereby the outgoing end exits the corrugated and longitudinally folded mineral wool insulation material 50'. The cohesive arrangement of the rollers facilitates corrugation and longitudinal folding of the flat mineral wool insulation material 50, i.e. the mineral wool insulation material 50 'of FIG.

• ·

Figure 6 shows a further embodiment of the longitudinally folded mineral wool insulation material 50 '. The arrangement of Fig. 6 comprises a station 60 which performs a combination of height / longitudinal compression and transverse folding. Station 60 comprises a total of six roller pairs, three of which are described in Figs. 56, 58; and 56 ', 58' rollers.

Station 60 shown in Figure 6 further comprises three pairs of rollers, the first pair of which are 152 'and

the mad party is the 152 'and 154 rollers. A 152 '.

The rollers 152 and 152 'are located at the upper side surface of the mineral yapot insulating material 50, as are the rollers 56', 56 and 56 '. The rollers 154 ', 154 and 154'

- like rollers 58 ', 58 and 58', are located at the lower side surface of mineral wool insulation material 50. A 152 ', 154'; 152, 154; and three roller pairs of rollers 152 ', 154' serve the same purpose as the conveyor belts 52, 54 described in connection with the second figure, that is, compress the mineral wool insulation material 50 entering the station 60 in height.

Height compression 152 ', 154'; 152, 154; and three roller pairs of rollers 152 ', 154' rotate, similarly to the conveyor belts 52, 54 described above, at the same speed as the rate of the mineral wool insulation material 50 entering the height compression station 60. Performs longitudinal compression • * · · · · · · · · ·

- three pairs of rollers forming 24 sections, i.e. 56 *, 58 '; 56, 58; and rollers 56 ', 58' rotate at a lower speed which determines the longitudinal compression factor.

Mineral soap 50 entering the station 60 of Figure 6 uses four crank mechanisms for longitudinally folding the insulating material, namely the crank mechanisms 160 ', 160, 160' and 160. Since the crank mechanisms are of the same construction, only one of the crank mechanisms 160 will now be described. The other crank mechanisms 160 ', 160' and 160 comprise the same elements as the crank mechanism 160.

The crank mechanism 160 comprises an engine 162 which drives a transmission 164 having an output shaft 166. A total of six 168 gears are mounted on the output shaft 166 in the same arrangement. Each of the gears 168 is connected to a gear 170. Each gear 170 forms a crank of a crank mechanism, the crank mechanism further comprising a runner 172 and a crank arm 174. The crank arms 174 are disposed so as to move from a retracted position to an elevated position between two adjacent rollers on the lower edge of the mineral wool insulator 50 introduced into station 60, and to cooperate with the upper edge 160 of the mineral wool insulation material 50 crank mechanism with crank arms.

Likewise, the crank arms of the crank mechanisms 160 * and 160 are located on the left edge of the mineral wool insulation material 50 introduced into the station 60, respectively. located on the underside, and cooperate as described below.

As shown in Figure 6, the first pair of crank arms 174 ', 174, 174', 174 of the crank mechanisms 160 ', 160, 160' and 160 are the first and second of the first and second rollers 152 ', 154', and 152, 154 between pairs of rollers. Similarly, the second pair of crank arms 152,

between pairs of rollers.

.The crankshafts have the same width in each of the six sets of crank arms. However, within each of the crank mechanisms 160 ', 160, 160' and 160, the first crank arm is the widest, and from then on, the crank arms become narrower to 56 ',

58 'to a sixth crank arm after a sixth pair of rollers.

The motors of the crank mechanisms 160 ', 160, 160' and 160 rotate the crank arms of one set of crank arms synchronously with the other three crank arms of the crank set in question. The crank arms of each of the six sets of crank arms operate synchronously and synchronized with the speed of the mineral wool insulation material entering the station 60. The widest, that is, the first set of crank arms, begins to fold the mineral wool insulation material 50 when the 160 and 45 wool, respectively. 160 • · · · · · · · ··· ································································•

The crank arms 174 and 174 of the crank mechanisms 26 are raised from their position below the lower side surface of the mineral wool insulation material 50 and come into contact with the lower side surface of the mineral wool insulation material 160; The crank arms 174 'and 174' of the crank mechanisms 160 'are simultaneously lowered from their position over the upper side surface of the mineral wool insulation material 50 and come into contact with the upper side surface of the mineral wool insulation material 50.

Further rotation of the output shafts 166 ', 166, 166' and 166 moves the crankshafts of the first crank arm assembly toward the center of the mineral wool insulation material 50, resulting in a drive in the center of the mineral wool insulation material 50. As the crank arms of the first crank assembly reach their center position, the crank arms of the crank mechanisms 160 'and 160' are raised while the crank arms of the crank mechanisms 160 and 160 are lowered and consequently their contact with the upper or lower mineral wool insulation material 50 breaks. with lower side surface.

As the mineral wool insulation material 50 proceeds through station 60, the following, i.e., the second crank arm assembly, creates a second and a third fold on the mineral wool insulation material 50, which second or third fold is located on opposite sides of the first fold. , the fourth, fifth, and sixth crank set continue to fold the mineral wool insulation material, and thus

- 27 a longitudinally fully folded mineral wool insulation material is obtained.

In each set of crank arms, the crank arms width, gear ratio 164 ', 164', 164 'and 164 gear ratios 168 and 170, and the rate of mineral wool insulation material 50 entering station 60 are selected to be consistent with each other and longitudinally the rotational speed of the vertical and longitudinal compression sections of the folding and longitudinally compressed mineral wool insulation material 50 '.

The crank arm systems described in Figure 6 do not require the integration of the elevation compression, longitudinal compression, and longitudinal folding sections as shown in Figure 6 into a single station. The height compression section, the longitudinal compression section and the longitudinal folding section can thus be separated, but the integration of the three functions reduces the size of the manufacturing layout. It is further emphasized that the folding of the mineral wool material described in Figures 4, 5 and 6 also results in transverse compression and compression of the material and homogenizes the inlet mineral wool material.

Figure 11 shows corrugated and longitudinally folded mineral wool insulation material 50 '. Corrugated and longitudinally folded 50 'mineral wool hi * ♦ · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ··· · · · «· ·« · ··

The germ material 28 comprises a central core 28 or body and two oppositely disposed surface layers 24 and 26, wherein the surface layers 24 and 26 are depicted in imaginary portions 20 and 26 respectively.

dividing lines separate the corrugated and longitudinally folded mineral wool 50 'from the central core 28 or body. The surface layers 24 and 26 of the corrugated and longitudinally folded mineral wool insulating material 50 'comprise segments of the folded mineral wool insulating material comprising substantially mineral fibers perpendicular to the longitudinal direction of the corrugated and longitudinally folded mineral wool insulation material 50'. The corrugated and longitudinally folded mineral wool insulation material 50 'is formed from the secondary mineral wool insulation material 50 by folding the secondary mineral wool insulation material 50 after possibly compacting the secondary mineral wool insulation material as described in the following section with reference to Figure 8. The general direction of its mineral fibers is maintained in the segments of the corrugated and longitudinally folded mineral wool insulation material 50 'forming the surface layers 24 and 26.

The central core 28 or body of the corrugated and longitudinally folded mineral wool insulation material 50 'comprises segments which are perpendicular to the segments constituting the surface layers 24 and 26 of the mineral wool insulation material 50'. As a result, the corrugated and longitudinally folded 50 'mineral wool insulating material interleaves. · ··· «··· ·« ·· ·

29 points in its core or body 28 are substantially perpendicular to the longitudinal and transverse directions of the corrugated and longitudinally folded mineral wool insulation material 50 '.

The corrugated and longitudinally folded mineral wool insulation material 50 'shown in Figure 11, produced by the techniques described with reference to Figures 3, 4, 5 and 6, is further processed to the station of Figure 7, wherein the surface layer 24 is separated from the corrugated and longitudinally folded from the central core or body 28 of the mineral wool insulation material 50 'along the dividing line 20 shown in FIG. The surface layer 24 is peeled off from the remainder of the mineral wool insulation material by means of a cutting tool 72, while the remainder of the mineral wool insulation material is supported and conveyed by the conveyor 70. The cutting tool 72 may be either a fixed cutting tool or a knife or a transversely movable cutting tool. The surface layer 24 separated from the mineral wool insulation material is diverted by the conveyor belt 74 from the transport path of the remainder of the mineral wool insulation material and then conveyed after the conveyor belt 74 to three pairs of rollers, the first pair of rollers 76 'and 78'; rollers and the third pair of rollers 76 'and 78'. The three pairs of rollers together form a compression or compression section, similar to the second section of the station described in connection with Figure 2.

In Figure 8, a transverse compression of 80 pseudorangers · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ♦ · «« · * ·

- 30 recesses visible. At station 80, the central core 28 or body or the corrugated and longitudinally folded mineral wool insulation material 50 'produced at one of the stations described in connection with FIGS. arranged to cross-compress the mineral wool insulation material. In addition, the mineral wool insulation material is contacted with four surface-forming rollers 89a, 89b, 89c and 89d, which cooperate with similar rollers opposite the rollers 89a, 89b, 89c and 89d (not shown) to transversely compress the central core 28 or body. The conveyor belts 85 and 86 are shown in Figs. It is mounted on rollers 82, 84.

From the transverse compression station 80, a transversely compressed and compacted central core or body 28 'exits. As the central core 28 or body passes through the transverse compression station 80 and transforms into the transversely compressed central core or body 28, it rests on the inlet roller 87 and the output roller 88.

Although the central core 28 or body entering the transverse compression station 80 is preferably a layer separated from the mineral wool insulation material 50 'as described in connection with FIG. 7, in another embodiment the mineral wool insulation material 50' may be machined at the station 80 shown in FIG.

If the 80 stations are centrally compressed · * 4 ·

- 31 28 cores or body or 50 * mineral wool insulation with an upper layer, eg. provided with the foil 99 described in connection with Figure 3, the structure of the foil shall be such that it is capable of transverse compression with mineral wool. Thus, the film applied to the upper side surface of the mineral wool insulation material 50, as shown in Figure 3, must be compressible and adapted to the reduced width of the transversely compressed central core 28 'or body or transversely compressed mineral wool insulation material exiting the transverse compression station.

After the peeled off topsheet 24 is compacted as shown in Figure 7, the compacted topsheet 24 is returned to the remainder of the mineral wool insulating material or to the core or body, which is preferably crushed transversely as described with respect to Figure 8, and body surface as shown in Figure 9.

9, a pair of rollers 79 'and 79 rollers are disposed on the upper and lower surfaces of the surface layer 24, respectively. at its lower side surface, by means of a pair of rollers a film 99 'may be applied from the roll 98' to the upper side surface of the compacted surface layer 24. After the rollers 79 'and 79, the surface layer 24 having a density greater than the central core 28 or body 28 is guided to the upper side surface of the central core 28 or body by the rollers 77' and 77. The roller 77 is disposed beneath the surface layer 24 to form a deflection roller, and the roller 77 'disposed above the upper side surface of the surface layer 24 presses the compacted surface layer 24 onto the upper side surface of the central core 28 or body. The core or body 28 is supported and transmitted by the conveyor 70 shown in Figure 7. After the compacted surface layer 24 is applied to the upper side surface of the central core or body 28, the composite mineral wool 90 is provided with an insulating material.

Figure 9 also shows a further 99 layers drawn with a dashed line. This film is removed from the roll 98. The film 99 may be a continuous film or a mesh film, similar to the film already described above. However, it is emphasized that foils 99, 99 'and 99 may be omitted in the manufacture of an integrated mineral wool structure. It is also possible to use embodiments in which one or more or all of said films are used in the manufacture of the mineral wool insulation material of the present invention.

The compacted surface layer 24, which in the embodiment of FIG. 7 is separated from the mineral wool insulation material 50 ', may be produced on a separate production line and one of the stations of FIGS. 3, 4, 5 and 6 may be in direct contact with the station of FIG. , preferably via the station of FIG. 8, so the station of FIG. 7 is not required in such an arrangement. Preferably, the station of FIG. 7 may be formed by separating two surface layers from the central core 28 or body, two opposed lateral surfaces of the central core or body 28, and forming the resulting surface layers as described in connection with FIG. and thereby produce two high density surface layers which are laid on opposite sides of the central core or body 28 by the technique described in connection with Figure 9, so that the central core 28 or body is sandwiched between . Prior to this, preferably the central core 28 or body 28 is transversely compacted as shown in FIG.

The mineral wool insulation material 90 shown in Figure 10 passes through a curing station comprising a heat treatment furnace consisting of opposed portions 92 and 94. The furnace portions 92 and 94 heat the mineral wool insulation material 90 to a temperature at which the thermosetting binder of the mineral wool insulation material hardens and the mineral fibers of the central core or body of the composite material and the mineral fibers of the compacted surface layer or layers are bonded together. a mineral wool insulation material is formed, which is cut with the help of knife 96 into board-like sheets. If the film 99 and possibly the films 99 'and 99 are used, their thermoplastic material also melts, providing additional bonding between the mineral fibers of the mineral wool insulation material. The plate 10 shown in Figure 10 comprises a central core 12 and a surface layer 14. The surface layer 14 is constituted by the central core 28 or body 28 of the compacted surface layer 24 and the core 12 by the corrugated and longitudinally folded mineral wool 50 material shown in Figure 11.

Figure 12 shows a first embodiment of a mineral wool insulation board 10 according to the invention. The mineral wool insulation sheet 10 has a central core 12, an upper layer 14 and a lower layer 16, the latter two layers being formed from the surface layer of the mineral wool insulation material 50 '. The segment 18 of the core 12 of the mineral wool insulation sheet 10 comprises the central core 28 or body 28 of the corrugated and longitudinally folded mineral wool insulation material 50, preferably pre-compressed transversely as shown in FIG.

Figure 13 shows a second embodiment of a mineral wool insulation board 10 'according to the invention. Like the mineral wool insulation sheet 10 described in connection with Figure 12, the mineral wool insulation sheet 10 'comprises a central core 12 as well as an upper layer 14 and a lower layer 16. In addition, at the stake of the disc is a cover 15 consisting of a film 99 'described in connection with FIG. The surface cover 15 may be a plastic net, a woven or nonwoven plastic film, or it may be made of a non-plastic material, e.g. of special paper for decorative and architectural purposes. The surface coating 15 may also be applied to the mineral wool insulation material after heat treatment of the thermosetting binder, that is, after the mineral wool insulation material 90 has been subjected to the heat produced by the furnace portions 92 and 94 shown in FIG.

• ·

Example 1

1-10, a heat-insulating board having a structure similar to the mineral wool insulation sheet shown in Figure 12, has the following characteristics:

The method includes steps similar to those described in Figures 1, 2, 6, 7, 8, 9 and 10. The production capacity of the production layout is 5000 kg / h. The primary mineral wool insulation material produced at the station of Figure 1 has a surface density of 0.4 kg / m ² and a width of 3600 mm. The density of the core 28 or body is 20 kg / m ³ . The extent of longitudinal compression at two separate stations similar to the station of Fig. 2 is 1: 1, respectively. 1: 2 and the transverse compression at the station of FIG. 8 is 1: 2. The surface layer has a thickness of 10.0 mm and a density of 100 kg / m ³ . The mineral wool insulation material produced according to Figure 1 has a width of 1800 mm.

The manufacturing parameters used are listed in Tables A and B:

The table

Full thickness THE B C D E F mm m / minxlO m / min m / min m / min m / min m / min 50 11:57 51.44 51.44 51.44 15.72 25.72 75 11:57 40.26 40.26 40.26 20:13 20:13 100 11:57 33.07 33.07 33.07 16:53 16:53 125 11:57 28.06 28.06 28.06 14:03 14:03 150 11:57 24.37 24.37 24.37 12:18 12:18 175 11:57 21:53 21:53 21:53 10.77 10.77 200 11:57 19:29 19:29 19:29 9.65 9.65 225 11:57 17:47 17:47 17:47 8.74 8.74 250 11:57 15.96 15.96 15.96 7.98 7.98 275 11:57 14.70 14.70 14.70 7:35 7:35

A = speed of conveyor 42

B = speed of the conveyor belt 48

C = speed of conveyor 70 after first longitudinal compression (Figure 2)

D = speed of conveyor 70 after transverse compression (Figure 8)

E = speed of conveyor 70 after second longitudinal compression (Figure 2)

F = speed of conveyor 70 in front of the heat treatment furnace (Figure 5)

- 37 Table B

Full thickness G H I J K L mm kg / m ² kg / m ² kg / m ² kg / m ² kg / m ² kg / m ² 50 0:45 0:45 0.90 0:40 0.80 1.80 75 0:58 0:58 1:15 0.65 1:30 2:30 100 0.70 0.70 1:40 0.90 1.80 2.80 125 0.83 0.83 1.65 1:15 2:30 3:30 150 0.95 0.95 1.90 1:40 2.80 3.80 175 1:08 1:08 2:15 1.65 3:30 4:30 200 1:20 1:20 2:40 1.90 3.80 4.80 225 1:33 1:33 2.65 2:15 4:30 5:30 250 1:45 1:45 2.90 2:40 4.80 5.80 275 1:58 1:58 3:15 2.65 5:30 6:30

G = surface density of mineral wool insulation material on conveyor 42

H = surface density of mineral wool insulation after first longitudinal compression (Figure 2)

I = surface density of mineral wool insulation material after transverse compression (Figure 8)

J = surface density of mineral wool insulation material before second longitudinal compression (Figure 2)

K = surface density of mineral wool insulation material after second longitudinal compression (Figure 2) • ·

L - surface density of mineral wool insulation material before the heat treatment furnace

The diagram in Figure 14 shows the evolution of the parameters given in Table A.

Figure 14 shows the curves of

We have killed the letters j in the table.

The diagram in Figure 15 shows the evolution of the parameters given in Table B.

The letters used in Table B

In Figure 15, the curves are killed.

Example 2

A composite slab of a structure similar to the mineral wool insulating board shown in Figure 12, produced by the process of the invention described in Figures 1-10, has the following characteristics:

The method includes steps similar to those described in Figures 1, 2, 6, 7, 8, 9 and 10. The production capacity of the production layout is 5000 kg / h. The primary mineral wool insulation material produced at the station of Figure 1 has a surface density of 0.6 kg / m ² and a width of 3600 mm. The density of the central 28 core or body is 110 kg / m ³ .

The extent of longitudinal compression at two separate stations similar to the station of Fig. 2 is 1: 3, respectively. 1: 2 and the transverse compression at the station of FIG. 8 is 1: 2. The finished sheet has a single surface layer with a surface density of 3.57 kg / m ² . The longitudinal compression of the surface layer is 1: 2. The surface layer has a thickness of 17.00 mm and a density

210 kg / m ³ . The mineral wool insulation material produced according to Figure 1 has a width of 1800 mm.

The manufacturing parameters used are listed in Tables C and D:

Table C

Full thickness THE B C D E F mm m / minxlO m / min m / min m / min m / min m / min 50 7.72 38.58 12.86 12.86 6:43 6:43 75 11:57 27.92 9:31 9:31 4.65 4.65 100 11:57 21.87 7:29 7:29 3.65 3.65 125 11:57 17.98 5.99 5.99 3:00 3:00 150 11:57 15:26 5:09 5:09 2:54 2:54 175 11:57 13:26 4:42 4:42 2:21 2:21 200 11:57 11.72 3.91 3.91 1.95 1.95 225 11:57 10:50 3:50 3:50 1.75 1.75 250 11:57 9:51 3:17 3:17 1:59 1:59 275 11:57 8.69 2.90 2.90 1:45 1:45

A = speed of conveyor 42

B = speed of the conveyor belt 48

C = speed of conveyor belt 70 after first longitudinal compression (Figure 2)

D = speed of conveyor 70 after transverse compression40 (Figure 8)

E = speed of conveyor 70 after second longitudinal compression (Figure 2)

F = speed of conveyor 70 before heat treatment furnace (Figure 5)

Table D

Full thickness G H I J K L mm kg / m ² kg / m ² kg / m ² kg / m ² kg / m ² kg / m ² 50 0.60 .1.80 3.60 1.82 3.63 7:20 75 0.83 2:49 4.98 3:19 6:38 9.95 100 1:06 3:18 6:35 4:57 9:13 12.70 125 1:29 3.86 7.73 5.94 11.88 15:45 150 1:52 4:55 9:10 7:32 14.63 18:20 175 1.75 5:24 10:48 8.69 17:38 20.95 200 1.98 5.93 11.85 10:07 20:13 23.70 225 2:20 6.61 13:23 11:44 22.88 26.45 250 2:43 7:30 14.60 12.82 25.63 29.20 275 2.66 7.99 15.98 14:19 28.38 31.95

G = surface density of mineral wool insulation material on conveyor 42

H = surface density of mineral wool insulation after first longitudinal compression (Figure 2)

I = surface density of mineral wool insulation material after transverse compression (Figure 8)

J = surface density of mineral wool insulation material before second longitudinal compression (Figure 2)

K = surface density of mineral wool insulation material after second longitudinal compression (Figure 2)

L = density of the mineral wool insulation material before the heat treatment furnace

Figure 16 is a diagram similar to Figure 14 showing the evolution of the parameters in Table C.

Figure 17 is a diagram similar to Figure 15 showing the evolution of the parameters in Table D.

EXAMPLE 3

The significance of the longitudinal and transverse compression of the mineral wool insulation material is illustrated by the data in Table E:

«·« ·

- Table 42

C to 1 1 Φ • H Φ > d N P P c co C <D '<C co • fi kill P :She P • H R d Φ N N G N <n CO <0 10 co Λ P 0 0 3 = G c & '(0 (0 X P E Φ R d rh sit N P 'Π5 Φ N to rd C E co > (0 Dü Φ Φ E P > rd P 0 CO »0 Φ > d • dO rd X G \ 1 '3 • rd Φ N & 1 P P C φ c Φ 'background of randomly M • rd kill P CO P • fi R d co Φ N N :She N CD co CU co '2 rd -P 0 > d , g > d SHE G c ft '(0 rd 'KJ (0 X P 'Φ E > d φ • rd c rd kill N P '10 > 1 Φ N <0 rd C E CO '(0 (SHE '03 Φ Φ E P > rh p She co '0 Φ > 1 < Dü rh Λ! P 1 <0 X cl Φ > 1 N P Φ '<0 E > Φ tn rd 'main * 0 rd <0 Φ 0 P Φ c kill »<0 • fi E N 0 (0 kill -P <Ü SHE K

to from CO cu fk ix X * * cn SHE c tendon H r4 CN

I I

I

I

I

I I

I I

I

I

I

I

I

I

(Ü « (Ü cu ck Pu X X tendon She CD co r4 r-1

ι I

I

I

I

I

I

I

I

I

I

I

I

I

I

(0 to to fX IX IX * X (N tendon She rh

kill sit '<0 'to co co Ό Ή Ό P sit P 'Φ '(U 'to rd co rd R d m ·· R d N to 10 N CO E P CO Ό rd rd Ό E to P E 0 sit Ό 0 > d P SHE > d £ K E

I I Φ

M3 P -P Φ 1 1 E '3 sit co 'Φ CD • rd Ό N <n :She <n CO N E «Ρ E <O Φ \ \ Λ E sit sit Φ AJ sit X * 3 r4 'Φ kill SHE co She 'Φ 10 tendon »s cn 10 fH rh P

plate Elastic modulus: 600 kPa ----- 3300 kPa ----- 4000 kPa «· * · · · ········································• · · · · · * · · ♦ ·· ··· ··· ··

The mineral wool insulating panels of the present invention have better compressive strength and elastic modulus than known thermal insulating panels. The mechanical properties of the mineral wool insulating panels of the present invention are further improved if the mineral wool insulation material of which the insulating panels are made is in accordance with the second and second steps.

8, longitudinally and transversely compressed.

Claims (35)

Claims A process for the production of mineral wool insulation material, characterized in that a) providing a first nonwoven mineral wool material having a first longitudinal direction parallel to its own plane and a second transverse direction parallel to its own plane, the first mineral wool material comprising mainly said second transverse mineral fibers and a first curable binder, b) moving said first mineral wool material in said first longitudinal direction, c) folding the first mineral wool material parallel to the first longitudinal direction, perpendicular to the second transverse direction, to form a second nonwoven mineral wool material, the second mineral wool material having a central body and surface layers surrounding the central body on both sides; being substantially perpendicular to the first longitudinal direction and the second transverse direction and substantially transverse to the second layers in the surface layers, d) moving said second mineral wool material in said first longitudinal direction, e) providing a third nonwoven mineral wool material defining a third direction parallel to its own plane, the third mineral wool material comprising mainly said mineral fibers and a second curable binder in said third direction, and a third spun wool. material is denser than the second mineral wool material, f) depositing the third mineral wool material on the second mineral wool material to form a fourth composite mineral wool material; and g) curing the first and second curable binders to form a bond between the mineral fibers of the fourth mineral wool material to form the mineral wool insulation material. 2. The process of claim 1, wherein the third nonwoven mineral wool material is prepared by separating a surface layer from the first mineral wool material and compacting said third mineral wool material. 3. The method of claim 2, wherein said compression of said surface layer comprises folding said surface layer so that the mineral fibers in said third mineral wool material are substantially transverse to the longitudinal direction of said third mineral wool material. The method of claim 1, wherein the third nonwoven mineral wool material is produced by separating one of said surface layers of the second mineral fiber material from the central body and compacting said surface layer. ········································ · · · · · · · · · · · · · · · · · · · · · · · 5. A process according to any one of claims 1-4, wherein a further step similar to step e) comprises producing a fifth nonwoven mineral wool material similar to said third mineral wool material, and in step f) said fifth mineral wool material as said second mineral wool material. is laid on a mineral wool material such that the second mineral wool material is located between the third and fifth mineral wool material in said fourth mineral wool material. 6. The method of any one of claims 1-5, wherein step c) comprises folding the first mineral wool material to form continuous waves in the first longitudinal direction of the first mineral wool material. The method of any one of claims 1-6, wherein said third direction is perpendicular to said first longitudinal direction. A method according to any one of claims 1-6, wherein said third direction coincides with said first longitudinal direction. A process according to any one of claims 1-8, wherein said first mineral is · 9 ··· * · · · · · 4 ··· In the production of 47 cotton fabrics, a nonwoven mineral wool material is used which is laid in overlapping layers. The method of claim 9, wherein the overlapping layers of the nonwoven mineral wool base material are substantially transverse to the second. The process according to any one of claims 1-10, wherein the first nonwoven mineral wool material produced in step a) is compressed in the height direction. The process according to any one of claims 1 to 11, wherein the first nonwoven mineral wool material produced in step a) is longitudinally compressed and / or the second nonwoven mineral wool material produced in step c) is longitudinally compressed. 13. A process according to any one of claims 1 to 12, wherein the second nonwoven mineral wool material produced in step c) is compressed transversely. 14. A process according to any one of claims 1 to 13, wherein the fourth composite and mineral wool material is introduced into a heat treatment furnace. * · * · «4 ·· * _ ♦ · · · · · · · · · · · · · · · · - We squeeze it before 48. The method of any one of claims 1 to 14, wherein a film is applied to one or both side surfaces of the first nonwoven mineral wool material and / or a film is applied to one or both side surfaces of the second nonwoven mineral wool material. 16. The method of any one of claims 1 to 15, wherein the cured fourth composite mineral wool material is sliced. A production arrangement for producing mineral wool insulation material, characterized in that it comprises a) a first means for producing a first nonwoven mineral wool material, the mineral wool material defining a first longitudinal direction parallel to its own plane and a second transverse direction parallel to its own plane, the first mineral wool material comprising mainly said second transversely disposed mineral fibers and . b) a second means for moving said first mineral wool material in said first longitudinal direction, c) a third means for folding the first mineral wool material parallel to the first longitudinal direction and perpendicular to the second transverse direction and producing a second nonwoven mineral wool material comprising a central body and surface layers surrounding the central body on both sides, the mineral fibers are located substantially perpendicular to the first longitudinal and second transverse directions in the central body and substantially transversely to the second, d) a fourth means for moving the second mineral wool material in said first longitudinal direction, e) a fifth means for producing a third nonwoven mineral wool material, the mineral wool material defining a third direction parallel to its own plane, the third mineral wool material comprising mainly said third fiber mineral fibers and a curable binder, and the third mineral wool material being bulk; the second mineral wool material, f) a sixth means for laying the third mineral wool material on the second mineral wool material and producing a fourth composite mineral wool material; and g) a seventh means for curing the first and second curable binders and forming a bond between the mineral fibers of the fourth composite mineral wool material and thereby forming the mineral wool insulation material. 18. The manufacturing arrangement of claim 17, wherein the fifth device for producing the third nonwoven mineral wool material is adapted to separate a surface layer from the first mineral wool material and to compact this surface layer. 19. A manufacturing arrangement as claimed in claim 18, characterized in that the fifth device is adapted to compress said surface layer by folding and that the mineral fibers in the produced third mineral wool material are substantially transverse to the longitudinal direction of the third mineral wool material. The manufacturing arrangement according to claim 17, characterized in that the fifth device for producing the third nonwoven mineral wool material is adapted to separate one of said surface layers of the second mineral fiber material from the central body and to compact this surface layer. . A manufacturing arrangement according to any one of claims 17 to 20, further comprising an eighth means adapted to produce a fifth nonwoven mineral wool material similar to said third mineral wool material and a fifth device, which is formed by laying the fifth mineral wool material on the second mineral wool material to form a fourth mineral wool material consisting of a second mineral wool material caught between the third and fifth mineral wool materials. The manufacturing arrangement according to any one of claims 17 to 20, characterized in that the third means for folding the first mineral wool material is adapted to produce continuous waves in the first longitudinal direction of the first mineral wool material. A manufacturing arrangement according to any one of claims 17 to 22, characterized in that said third direction is perpendicular to said first longitudinal direction. A manufacturing arrangement according to any one of claims 17 to 22, characterized in that said third direction is identical to said first longitudinal direction. The manufacturing arrangement according to any one of claims 17 to 24, characterized in that the first means for producing the first mineral wool material is arranged to overlap the nonwoven mineral wool base material. 26. The manufacturing arrangement of claim 25, wherein said first device is adapted to lay nonwoven mineral wool base material in second transversal overlapping layers. A manufacturing arrangement according to any one of claims 17 to 26, characterized in that the first nonwoven mineral wool material produced by said first device comprises a tenth device for compressing in a height direction. A production arrangement according to any one of claims 17 to 27, further comprising an eleventh device adapted for longitudinally compressing the first nonwoven mineral wool material produced by said first device and / or a twelfth device which comprises said third device. The second nonwoven mineral wool fabric produced by means of a tool is formed for longitudinal compression of a material. 29. A manufacturing arrangement according to any one of claims 17 to 28, further comprising a thirteenth device adapted to transversely compress second nonwoven mineral wool material produced by said third device. A production arrangement according to any one of claims 17 to 29, further comprising a fourteenth device configured to compress said fourth composite mineral wool material prior to introducing said heat treatment furnace into said furnace. The manufacturing arrangement according to any one of claims 17 to 30, further comprising a fifteenth device adapted to apply a film to one or both side surfaces of the first nonwoven mineral wool material and / or to one or both side surfaces of the second nonwoven mineral wool material. . 32. A manufacturing arrangement according to any one of claims 17 to 31, further comprising a sixteenth device for cutting said cured fourth composite mineral wool material into sheets. 33. A mineral wool insulating board having a longitudinal direction, comprising a central body of mineral fibers and a surface layer of mineral fibers superimposed on the central body and a surface layer of mineral fibers of said central body in said longitudinal direction and being substantially perpendicular to the layer, the mineral fibers of the surface layer being substantially parallel to said longitudinal direction, the surface layer being denser than the central body, and the mineral fibers of the central body and the mineral fibers of the superficial layer forming the central body and , are initially integrated in a non-woven mineral wool material and cured in a single process to form a single structure. 34. Mineral wool insulation sheet according to claim 33, characterized in that it has surface layers of a similar structure that surround the central body in said integrated structure. Mineral wool insulating board according to claim 33 or 34, characterized in that it is produced by the process according to any one of claims 1 to 16 and / or by the manufacturing arrangement according to any one of claims 17 to 32.