RO112771B1 - Mineral fiber insulated plate, manufacturing process and installation - 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

The invention relates to a mineral fiber insulating plate, as well as to a process and an installation for making this plate. Mineral fibers, in general, are represented by asbestos fibers and glass fibers.

Mineral fiber insulating thin blankets are typically produced as homogeneous blankets, the mineral fibers of which are made are generally oriented in a single predominant direction, which is largely determined by the orientation of the production line where it is obtained. mineral fiber insulating blanket and where this mineral fiber insulating blanket is transmitted. The product made of a homogeneous mineral fiber insulating blanket has characteristics that are determined by the integrity of the mineral fiber insulating blanket and which are predominantly determined by the binding of mineral fibers inside the mineral fiber insulating plate, produced from the mineral fiber insulating blanket. respective, by the weight related to the surface, as well as by the density of the mineral fibers of the mineral fiber insulating plate.

Advantageous properties of mineral fiber insulating plates of a different structure are obtained to a certain extent by the usual techniques of producing mineral fiber insulating plates, techniques by which mineral fibers are oriented in a global arrangement different from the orientation determined by the line of production (International Application PCT / DK91 / 00383, International Publication W092 / 10602, US Patent 4950355, SE Patent 441764, US Patent 2546230; 3493452)

A process for obtaining a mineral fiber insulating plate, consisting of elements of mineral fibers in the form of interconnected rods, is known (publication WO / 10602). This process consists of cutting a continuous thin blanket of mineral fibers in its longitudinal direction to form the blades, cutting the blades to desired lengths, twisting the blades at an angle of 90 ° to the longitudinal axis and tying the blades together to form the plate. The process also comprises a step of curing either the continuous mineral fiber blanket or the plate made up of the individual length blades bonded together to form the plate.

Also known is a process for obtaining mineral fiber panels and plates composed of rod-shaped elements, a process which is similar to that described above. (Patent SE 441764). Thus, a thin blanket of mineral fiber materials is cut into rod-shaped elements of a specific length, which are then twisted and reassembled into a composite rod-shaped mineral fiber plate structure. The rod-shaped elements are glued together with the aid of binder material that are inserted into the openings that cross the composite structure of mineral fiber-shaped rod in a separate production step.

Another process for producing mineral fiber panels or plates, composed of rod-like elements similar to those described above, comprises a separate rod-shaped linking step by means of a suitable binding agent (US Pat. 2546230 )

By another process, a fibrous sheet structure is obtained which contains filaments or fibers of a polymeric material (polyethylene terephthalate or polyhexamethylene adipamide (US Pat. No. 3493452). The process consists of producing filaments or fibers from polymeric material using a carriage from a source of filaments or fibers in the form of an elastic, porous, filament or fiber layer, collecting the filaments or fibers of the polymer on a strip to form a continuous thin blanket of filaments or fibers of polymeric material, compressing the blanket, cutting the blanket in a series of parallel fiber strips containing filaments or fibers of polymeric material and twisting the strips at an angle of 90 ° along the longitudinal axis and joining all strips, when they are

EN 112771 Bl determined to produce their unification only by releasing a compression effect applied previously to the strips, during the twisting process. The blanket obtained according to this process (US patent 3433452) is suitable for the manufacture of various products: carpets, blankets, bedspreads, bathrobes.

One of the purposes of the present invention is to provide a new process for obtaining a thin mineral fiber insulating blanket from which mineral fiber insulating plates can be cut, a process by which it is possible to obtain plates on a continuous production plant. mineral fiber insulators having a composite and complex structure, which offer distinct advantages, compared to homogeneous plates containing mineral fibers oriented in one direction.

A particular advantage of the process according to the invention is that the new mineral fiber insulating plate, as compared to mineral fiber insulating plates known in the art, contains fewer mineral fibers and is consequently more accessible, while maintaining its advantages over the insulating plates of mineral fiber. Known mineral fibers, related to mechanical performance, as well as thermal insulation properties.

□ A special feature of the invention relates to the fact that the mineral fiber insulating plate made by the process according to the invention is obtained from fewer mineral fibers or less material, as compared to the usual mineral fiber insulating plates, however, having the same properties from the point. view of mechanical strength and thermal insulation properties. Thus, the mineral fiber insulating plate made by the process according to the invention is lighter and more compact than the known mineral fiber products, causing the reduction of the costs of transport, storage and handling.

The insulating plate, according to the invention, is formed of a central body containing mineral fibers, united in face-to-face contact with a layer or two opposing surface layers, containing mineral fibers, the mineral fibers of the central body being arranged generally perpendicularly. along the longitudinal direction and perpendicular to the surface layer or layers. Mineral fibers related to the surface layer or layers are generally arranged in a direction parallel to the longitudinal direction.

The surface layer or layers have a greater compactness than the compactness of the central body. The mineral fibers in the central body and the mineral fibers in the surface layer or layers are linked together in an integrated structure only by curing agents based on cured resins. curing is carried out in a single curing process. Binding agents are initially present in the retained, unreinforced mineral fiber blankets, from which the central body and surface layers are produced.

The opposite surface layers have similar structures and frame the central body in the integrated structure.

The insulating plate has advantageous characteristics in terms of technical performance, namely in terms of modulus of elasticity and strength. It has a low weight and good thermal insulation properties.

The process according to the invention consists of the following steps:

a) obtaining a first blanket of non-woven mineral fibers, which defines a first longitudinal direction parallel to the first blanket of mineral fibers, and a second transverse direction, parallel to the first blanket of mineral fibers, the first blanket of mineral fibers containing generally arranged mineral fibers in the second transverse direction and including a first hot curing agent;

b) moving the first blanket of mineral fibers in the first longitudinal direction of the first blanket of mineral fibers;

c) folding the first mineral fiber blanket parallel to the first longitudinal direction and perpendicular to the second transverse direction, so that a second blanket of non-mineral fiber fibers is produced

RO 112771 Bl hundreds, the second mineral fiber blanket having a central body and opposite surface layers, the central body containing the mineral fibers generally arranged perpendicular to the first longitudinal direction and the second transverse direction, and the surface layers containing the fibers minerals generally arranged in the second transverse direction;

d] moving the second blanket of mineral fibers in the first longitudinal direction;

e] the production of a third blanket of non-woven mineral fibers, which defines a third direction parallel to the third blanket of mineral fibers, the third blanket of mineral fibers containing mineral fibers generally arranged in the third direction and including a second agent; hot binders, the third mineral fiber blanket being a mineral fiber blanket with greater compactness compared to the second mineral fiber blanket;

f) bringing the third mineral fiber blanket in face-to-face contact with the second mineral fiber blanket to produce a fourth mineral fiber composite blanket and

g) strengthening of the first and second binding agents which are hotly assembled so as to cause the mineral fibers of the fourth layer of composite mineral fibers to bind to each other, thus forming the insulating blanket. of mineral fibers, which are cut into segments of plate.

The third non-woven mineral fiber blanket that attaches to the second mineral fiber blanket in step f] may constitute a separate mineral fiber blanket. Thus, the first and third mineral fiber blankets can be produced on separate production lines that join in step f).

According to a first embodiment of the process according to the invention, the third blanket of non-woven mineral fibers is produced by separating a surface segment layer corresponding to the first mineral fiber blanket and by compacting the surface segment layer.

The third mineral fiber blanket can also be produced by compacting the surface segment layer, which consists of a step of folding the surface segment layer so that the third mineral fiber blanket containing the generally arranged mineral fibers is produced. in a transverse orientation to the longitudinal direction of the third mineral fiber blanket.

According to another preferred embodiment of the process according to the invention, the third non-woven mineral fiber blanket is produced by separating one of the surface layers of the second mineral fiber blanket produced in the step

c] by its central body and by compacting the surface layer to produce the third blanket of mineral fibers. Due to the fact that the third mineral fiber blanket is produced by separating the surface layer from the second mineral fiber blanket, the mineral fibers of the third mineral fiber blanket maintain the general orientation of the mineral fibers from the second mineral fiber blanket, that is, the general orientation in the second transverse direction.

The process according to the invention further preferably comprises an additional step similar to step e) for producing the fifth non-woven mineral fiber blanket, similar to the third mineral fiber blanket, and a joining step in the step f] the fifth mineral fiber blanket with the second mineral fiber blanket in face-to-face contact with it and so as to fit the second mineral fiber blanket between the third and fifth mineral fiber blankets in fourth mineral fiber blanket. By producing the fifth non-woven mineral fiber blanket, an integrated composite structure of the mineral fibers of the fourth mineral fiber blanket is realized, a structure in which the central body from the second mineral fiber blanket is framed between opposite compacted surface layers, represented by the third and fifth layers of mineral fibers.

The folding step of the first mineral fiber blanket is preferably performed

RO 112771 Bl so as to produce the continuous ripple extending on the first longitudinal direction of the first mineral fiber blanket, in order to obtain a second folded, precisely structured mineral fiber blanket 5, from which the layer is easily separated surface (s).

When the third blanket of mineral fibers is made as surface layers separated from the second blanket of one mineral fiber, the mineral fibers of the third blanket of mineral fibers are, as mentioned, generally oriented along to the second transverse direction. Accordingly, the third direction may coincide with the second transverse direction and as such be perpendicular to the first longitudinal direction.

When the third mineral fiber blanket is produced on a separate manufacturing line, the third direction may be of any arbitrary orientation, for example it may be identical with the first longitudinal direction and, consequently, be perpendicular to the second transverse direction. . 25

The process according to the invention further comprises, preferably introducing a step of producing the first mineral fiber blanket from a non-woven, basic mineral fiber blanket, by arranging the base 30 mineral fiber blankets into overlapping layers so as to obtain a blanket. of mineral fibers more homogeneous and more compact compared to the base of mineral fibers, which, furthermore, contains mineral fibers 35 generally oriented along the longitudinal direction of the base of mineral fibers. By producing the first mineral fiber blanket from the basic non-woven mineral blanket, by arranging 40 basic mineral fiber blankets in overlapping layers, the general orientation of the mineral fibers from the basic blanket, from non-woven mineral fibers, is changed from the direction. longitudinally of the base blanket 45 of mineral fibers in the transverse direction of the first blanket of non-woven mineral fibers. The basic non-woven mineral fiber blanket is preferably arranged in a generally overlapping position on the second transverse direction 50.

The first and second non-woven mineral fiber blankets are preferably subjected to compaction and compression in order to make more compact and more homogeneous mineral fiber blankets. Compaction and compression may include height compression, longitudinal compression, transverse compression and combinations thereof.

The process according to the invention therefore also preferably comprises an additional height compression step of the first non-woven mineral fiber blanket produced in step a) and preferably obtained from the non-woven mineral fiber base blanket, as mentioned.

Further, it is preferred that the process according to the invention comprises the additional step of longitudinally compressing the first non-woven mineral fiber blanket obtained in step a] and in addition to or in place of this additional step of longitudinal compression of the second mineral fiber blanket. non-woven fabric produced in step c). By performing a longitudinal compression, the mineral fiber blanket subjected to this longitudinal compression becomes more homogeneous, resulting in a general improvement of the mechanical performance and, in most cases, of the thermal insulation property of the mineral fiber blanket longitudinally compared to a blanket. mineral fibers not compressed longitudinally.

As is clear from the detailed description below of preferred embodiments of the invention, the mineral fiber insulating plates produced have surprisingly improved mechanical properties and mechanical yield, when the second non-woven mineral fiber blanket produced in step c] is subjected to transverse compression. , resulting in a homogenization of the structure of the mineral fibers of the second non-woven layer of mineral fibers. Cross-sectional compression of the second non-woven mineral fiber blanket leads to a remarkable improvement of the mechanical properties and performance of the final mineral fiber insulating sheets produced from the second non-woven mineral fiber blanket, improvement.

RO 112771 Bl which is supposed to come from the mechanical repositioning of the mineral fibers of the second blanket of non-woven mineral fibers, when the second blanket of non-woven mineral fibers is subjected to transverse compression, repositioning by which the mineral fibers of the second two blankets of non-woven mineral fibers are evenly distributed throughout the blanket of non-cured mineral fibers.

The process according to the invention may also preferably and advantageously comprise the step of applying a foil to one or both surfaces of the first blanket of non-woven mineral fibers and / or applying a foil to one or both surfaces of the foil. the second blanket of non-woven mineral fibers. The foil may be a plastic sheet, a continuous foil, a woven or non-woven sieve, or it may be a non-plastic foil, a paper or a fabric. The mineral fiber insulating blanket according to the invention may, as stated, be produced with two oppositely arranged mineral fiber blankets that fit into the sandwich system a central body of the mineral fiber composite insulating blanket. When the mineral fiber insulating blanket is produced as a three-layer assembly, one or both of the outer surfaces may be provided with similar or identical surface coatings.

The process of the invention may further comprise a further step of compressing the fourth mineral fiber composite blanket prior to inserting the fourth mineral fiber composite blanket into the curing oven. Compression of the fourth mineral fiber composite blanket may consist of height compression, longitudinal compression and / or transverse compression. By compressing the fourth mineral fiber composite blanket, it is appreciated that the homogeneity of the final product is improved, because the compression of the fourth mineral fiber composite blanket produces a homogenizing effect on the central body of the fourth mineral fiber composite blanket. , the central body which consists of the central body of the second blanket of non-woven mineral fibers.

In order to make a more homogeneous and more compact mineral fiber blanket to be inserted into a curing oven in step g], the method according to the present invention preferably further comprises a further compacting step of the fourth composite blanket. of mineral fibers before the introduction of the fourth blanket of mineral fiber in the curing oven. By compacting the fourth blanket of mineral fiber composites, the homogeneity of the final product is enhanced because, the compacting of the fourth blanket of mineral fibers, composite produces a homogenizing effect of the central body of the fourth blanket of mineral fibers, composites, central body consisting of the body. central of the second blanket of non-woven mineral fibers.

Step g) reinforcing the first binding agent, which eventually strengthens, and the second and third binding agents, can be carried out, depending on the nature of the binding agent or agents, in many different ways, for example by the mere exposure of the binding agent or agents to a gas or a curing atmosphere, such as the atmosphere, by exposing the binding agent or agents to radiation (UV or IR radiation). When the binding agent or binding agents are hot-curing binding agents, such as the usual resin-based binding agents commonly used in the mineral fiber industry, the process of hardening the binding agent or agents is in the step of introduction of the mineral fiber blanket to be cured in a curing oven. Consequently, the curing phase is carried out with the aid of a curing oven. Other hardening machines can be IR radiators, microwave radiators.

From the cured mineral fiber insulating blanket produced in step g], plate segments are preferably cut by cutting the fourth composite, cured blanket, from mineral fibers into plate segments in a separate production step.

RO 112771 Bl

1 rate.

The process according to the invention is carried out in a plant for producing mineral fiber insulating blankets comprising: 5

a) a first means of producing the first non-woven mineral fiber blanket, which defines a first longitudinal direction parallel to the mineral fiber blanket and a second transverse direction parallel to a first mineral fiber blanket, the first mineral fiber blanket being produced such that contain mineral fibers generally arranged in the second transverse direction and include a first binding agent that can be strengthened;

b) a second means of moving the first mineral fiber blanket in the first longitudinal direction of the first mineral fiber blanket; 20

c) a third folding means of the first mineral fiber blanket parallel to the first longitudinal direction and perpendicular to the second transverse direction, so as to produce the second nonwoven mineral fiber blanket consisting of a central body and layers. opposite surface which fits into the sandwich system the central body, the central body containing the mineral fibers generally arranged perpendicularly 30 in the first longitudinal direction and in the second transverse direction, and the surface layers containing the mineral fibers generally arranged in the second transverse direction; 35

d) a fourth means of moving the second blanket of mineral fibers in the first longitudinal direction;

e) a fifth means of producing the third blanket of mineral fibers 4 a non-woven fabric, which defines the third direction parallel to the third blanket of mineral fibers, the third blanket of mineral fibers being produced so as to contain the mineral fibers generally arranged in the third direction and containing a second, noticeable binding agent, the third mineral fiber blanket being a mineral fiber blanket with greater compactness compared to the second mineral fiber blanket; 50

f) a sixth means for attaching the third blanket of mineral fibers to the second blanket of mineral fibers in face-to-face contact with each other for producing the fourth blanket of mineral fiber, composite, and

g] a seventh curing means of the first and second bonding agents which can be bonded to cause the mineral fibers of the fourth blanket of mineral fibers to bond to each other, thereby forming the fiber insulating blanket. minerals.

The installation according to the invention may also advantageously contain elements related to any of the features of the process according to the invention described above.

The invention is further illustrated in connection with FIG. 1 ... 17, which represents:

FIG. 1, a schematic and perspective view, illustrating a first process step for obtaining an insulating blanket of mineral fibers from a melt from which mineral fibers are formed;

- Fig. 2, a schematic and perspective view, illustrating a process step of compacting the mineral fiber insulating blanket;

-fig.3 ... 6, schematic and perspective views, illustrating four variants of a process for folding the mineral fiber insulating blanket parallel to the longitudinal direction of the mineral fiber insulating blanket;

- Fig. 7, a schematic and perspective view illustrating a process step, consisting of the separation of a surface layer from the folded mineral fiber insulating blanket, obtained according to the variants described in figs. 3 ... 6, and a compaction step of the surface layer;

- Fig. 8, a schematic and perspective view, illustrating a cross-compression step of a mineral fiber insulating blanket produced in the process step shown in Fig. 7;

- Fig. 9, a schematic and perspective view, illustrating a step of aligning a surface layer, preferably of a surface layer compacted by a mineral fiber insulating blanket, or preferably by a remaining part of an insulating blanket of mineral fibers produced

RO 112771 Bl according to the variants described in fig. 3 ... 6, of which a surface layer is separated according to the variant shown in fig. 7;

FIG. 1O, a schematic and perspective view illustrating a process step for curing a mineral fiber insulating blanket and a separation step for the mineral fiber insulating blanket cured in plate segments;

FIG. 11, a schematic view, in section and perspective, illustrating the folded mineral fiber insulating blanket produced according to the variants shown in fig. 3. ..6;

FIG. 12 is a schematic and perspective view illustrating a first embodiment of a segment of mineral fiber insulating plate produced in accordance with the embodiments shown in FIG. 1 ... 10;

FIG. 13, a schematic and perspective view, illustrating a second embodiment of a segment of mineral fiber insulating plate produced according to the variants shown in FIG. 1 ... 10;

FIG. 14 and 15, diagrams showing the technological parameters of a continuous production plant that makes insulating plates for construction generally from a mineral fiber insulating blanket, obtained according to the indications of the invention and

FIG. 16 and 17, diagrams similar to those in FIG. 14 and 15, respectively, which show the production parameters of a continuous production plant, which makes thermal insulation plates for roofs, of mineral fibers, obtained from a mineral fiber insulating blanket produced according to the indications of the invention.

in FIG. 1 shows a first step of producing a mineral fiber insulating blanket. The first step consists of the formation of mineral fibers from a melt from which melt mineral fibers are obtained obtained in an oven 30 and which is fed from a drain nozzle 32 of the furnace 30 to a system of four spinning wheels 34 which are they rotate at high speeds, to which melt forming mineral fibers is fed in the form of a melt current 36 forming mineral fibers. While the melt current which forms mineral fibers 36 is sent to the spinning wheels 34 in a radial direction against them, a stream of cooling gas is simultaneously fed to the wheels 34 which rotate at high speed, in the axial direction of their determining the formation of the individual mineral fibers, which are removed or spread from the spinning wheels 34, as illustrated by the reference 38. The dispersed mineral fibers 38 are collected on a first conveyor belt 42 which operates continuously and forms a first mineral fiber insulating thin blanket 40. A hot curing agent is added to this first mineral fiber insulating blanket 40, either directly on the first mineral fiber insulating blanket 40, or in the phase of removing mineral fibers from the wheels. 34, ie in the formation phase of the individual mineral fibers. The first conveyor belt 42 is, as shown in FIG. 1, composed of two sections of conveyor belt. □ the first section of the conveyor belt, which is inclined to the horizontal direction, is inclined and to the second section of the conveyor belt which is practically horizontal. The first section constitutes a collecting section, while the second section constitutes a transport section by means of which the first insulating blanket 40 of mineral fibers is transferred to the second and third continuously operating conveyor belts, 44 and 46, respectively. works synchronously with the first conveyor belt 42 to fit into a sandwich system the first mineral fiber insulating blanket 40 between two adjacent surfaces of the conveyor belts, the second tape 44 and the third tape respectively 46.

The second conveyor belt 44 and third 46 respectively communicate with the fourth conveyor belt 48 which is a collecting conveyor belt, on which the second mineral fiber insulating blanket 50 is collected as the second and third conveyor belt 44 and 46 respectively swing on the upper surface of the fourth conveyor belt 48 in a transverse direction to the belt

Fourth conveyor blank 48. The second mineral fiber blanket 50 is consequently produced by arranging the first mineral fiber insulating blanket 40 in a generally overlapping shape on the transverse direction of the fourth conveyor belt 48.

By producing the second mineral fiber insulating blanket 50 from the first mineral fiber insulating blanket 40, as shown in FIG. 1, the second more homogeneous mineral fiber insulating blanket 50 is obtained compared to the first less homogeneous mineral fiber insulating blanket 40.

It should be noted that the overall orientation of the mineral fibers in the first mineral fiber insulating blanket 40 is parallel to the longitudinal direction of the blanket 40 and to the direction of transport of the first conveyor belt 42. Contrary to the first mineral fiber insulating blanket 40, the orientation overall of the mineral fibers of the second mineral fiber insulating blanket 50 is totally perpendicular and transverse to the longitudinal direction of the second mineral fiber insulating blanket 50 and of the transport direction of the fourth conveyor belt 48.

Figure 2 shows a compaction and homogenization station of a mineral fiber insulating blanket 50 'introduced in the station, a station that aims to compact and homogenize this insulating blanket of mineral fiber 50' entered, to obtain a blanket mineral fiber insulating blanket 50, blanket exiting the station and which is more compact and homogeneous compared to mineral fiber insulating blanket 50 '. The mineral fiber insulation blanket entered 50 'may be the second mineral fiber insulating blanket 50 produced in the station shown in fig · 1 ·

The compaction station comprises two sections. The first section consists of two conveyor belts 52 and 54, which are located above the upper part and respectively at the lower part of the mineral fiber blanket 50 '. The first section is mainly a section where the mineral fiber blanket 50 'entered in the section is subjected to height compression, resulting in a reduction of the entire height of the 5 mineral fiber blanket and a compaction of the mineral fiber blanket. Accordingly, the conveyor belts 52 and 54 are so positioned as to tilt from the inlet end on the left side of FIG. 2, the input end where the mineral fiber blanket 50 'is inserted in the first section, towards the output end, where the mineral fiber blanket compressed at height is sent to the second compaction section.

₁₅ The second section of the compaction station consists of three sets of rollers 56 'and 58', 56 "and 58, and 56 'and 58

The rollers 56 ', 56 and 56' are located on the upper surface of the mineral fiber blanket ₃ , while the rollers 58 ', 58 and 58' are located on the lower surface of the mineral fiber blanket. The second section of the compaction station performs a longitudinal compression of the mineral fiber blanket, a longitudinal compression that produces a homogenization of the mineral fiber blanket, because the mineral fibers in the mineral fiber blanket are determined to rearrange in comparison with the initial structure in a more homogeneous structure. The three sets of rollers, 56 'and 58', 56 and 58, and 56 'and 58' of the second section rotate at the same rotational speed, which is smaller than the speed of movement of the conveyor belts 52 and 54 of the first section, thus producing longitudinal compression of the mineral fiber blanket. The mineral fiber blanket compressed by height and longitudinally compressed is removed from the ⁴ compaction station (shown in fig. 2, and marked with the reference 50).

It should be noted that the combined height and longitudinal compression station and compaction shown ⁴⁵ in FIG. 2 can be modified by eliminating one of the two sections, ie the first section constituting the height compression section, or vice versa, the second section which constitutes the ⁵⁰ tudinal long compression section. By eliminating one of those

EN 112771 Bl two sections of the compaction station shown in fig.2 are made a compaction section that performs a single compaction or compression operation, such as a 5-height compression station or a longitudinal compression station. Although the height compression section is described as including conveyor belts, and the longitudinal compression section is described as including rollers, both sections can be made by means of strips or rollers. Also, the height compression section can be made by means of rollers, and the longitudinal compression section can be made by means of conveyor belts.

In Figs. 3, 4, 5 and 6 four alternative variants of the mineral fiber insulating blanket are given in the longitudinal direction 20 of the mineral fiber insulating blanket. in FIG. 3 ... 6 the mineral fiber insulating blanket 50 may be represented by the mineral fiber insulating blanket 50 shown in FIG. 2, or may be the blanket 25 mineral fiber insulators 50 produced in the station shown in fig. 1.

in FIG. 3, the mineral fiber insulating blanket 50 is brought into contact with a pressing roller 51, with which 30 a continuous sheet of thermoplastic material 99 is applied to the upper surface of the mineral fiber insulating blanket 50. The continuous sheet of thermoplastic material is brought from a roller 98. After the continuous foil 35 has been applied to the upper surface of the mineral fiber insulating blanket 50, the mineral fiber insulating blanket 50 and the continuous continuous foil 97 applied are forced to pass through a corrugated gate 40 ', gate which consists of two guide plates 64 'and 66', corrugated, arranged opposite, as well as two final walls arranged opposite, one of them being marked with the mark 62 '. It is easy to understand 45 that the foil 99 must have an elasticity that allows the foil 99 together with the mineral fiber insulating blanket 50 to bend. The final walls of the corrugated portion 60 'and the corrugations of the plates 64' 50 and 66 'of the corrugated portion form a taper from the entrance end of the corrugated portion 60' to an exit end thereof. As the mineral fiber insulating blanket 50 and the foil 99 applied thereto are passed through the corrugated gate 60 ', the mineral fiber insulating blanket folds in its longitudinal direction, resulting in an insulating blanket of mineral fiber 50' corrugated and longitudinally folded. .

Figure 4 shows another variant of the production of the mineral fiber insulating blanket 50 'corrugated and longitudinally folded from the flat mineral fiber insulating blanket 50. The process described in fig. 4 differs from that described above and reproduced in fig. 3. by the fact that a gate 60 is used which differs from the corrugated gate 60 'in fig.3, by the fact that gate 60 has opposite flat planed walls, one of which is noted as the reference 64 and curved lateral end walls of which one is noted as reference 62.

FIG. 5 shows an alternative process for producing the longitudinally folded mineral fiber insulating blanket 50 'from the flat mineral fiber insulating blanket 50. According to the process variant shown in FIG. 5, the wavy mineral fiber insulating blanket 50' and longitudinally folded is obtained with the help of a set of rollers 60 'which has side planar side walls 62' which use for the same purpose as side planar side walls 62 ', as well as curved side walls 62 shown in fig.3 and fig.4 respectively , namely the purpose of guiding the outer edges of the flat mineral fiber insulating blanket 50 towards the longitudinally curved and folded configuration of the mineral fiber insulating blanket 50 '. The roller assembly 60 'also contains a system of eight sets of rollers, each set of rollers being composed of two rollers which are placed on the opposite surfaces of the mineral fiber insulating blanket, in fig. 5 two rollers are marked with part number 68. The roller sets form a conical configuration, the taper starting from the inlet end of the 60 'roller assembly and going to its output end, exit end from where the blanket

EN 112771 Mineral fiber insulation 50 'corrugated and longitudinally folded is removed. The conical configuration aims to help the flat mineral fiber insulating blanket 50 to bend and fold 5 longitudinally taking the configuration of the folded mineral fiber insulating blanket 50 'shown in fig.5.

Fig. 6 shows another process for producing the longitudinally folded fiber and mineral insulating blanket 50 '. According to the process variant shown in Fig. 6, a station 60 is used which constitutes a combined longitudinal height compression station and ιξ a transverse folding station. Thus, station 60 consists of a total of six sets of rollers, of which three sets consist of the three sets of rollers 56 ', 58'; 56, 58; 56 ', 58' mentioned with 2C referring to fig.2.

The station 60 represented in FIG. 6 further comprises three sets of rollers, of which a first set consists of two rollers 152 'ȘÎ 154', a second set consists of 2 5 two rollers 152 and 154 and a third set is consisting of two rollers 152 'and 154' The rollers 152 ', 152 and 152' are located on the upper surface of the mineral fiber insulating blanket 50 as are the rollers 56 ', 3 o 56 and 56'. The three rollers 154 ', 154 and 154' are located on the lower surface of the mineral fiber insulating blanket 50 as well as the rollers 58 ', 58 and 58'. The three sets of rollers 152 ', 154'; 35 152, 154 and 152 ', 154' use for the same purpose as the strip assemblies 52, 54 presented above with reference to fig. 2, that is, for the purpose of compressing at height of the fiber insulation blanket 4 a mineral 50 entered the station 60.

The three sets of compression rollers at height 152 ', 154'; 152, 154 and 152 ', 154', like the strip assemblies 52, 54 described 4 5 above, operate at a rotational speed identical to the speed of the mineral fiber insulating blanket 50 entered in the height compression section of the station 60 The three sets of rollers constituting the section of 50 longitudinal compression, ie rollers 56 ', 58'; 56, 58 and 56 ', 58', operate at a low rotational speed, determining the longitudinal compression ratio.

In order to generate the longitudinal folding of the mineral fiber insulating blanket 50 entered in the station 60, represented in fig.6, four assemblies of crankshafts marked with the marks 160 ', 160, 160' and 160 are provided. The crankshaft assemblies have identical structures. The following describes a single set of crankshaft, assembly 160, because the crankshaft assemblies 160 ', 160' and η 60 · '. are identical to the assembly of crankshaft 160 and contain elements identical to the elements of the crankshaft assembly 160, being numbered with the same numbers having the sign and respectively.

The crankshaft assembly 160 consists of an engine 162 which sets in motion a gear assembly 164, from which a shaft 166 exits. On the shaft 166 a total of six gear wheels 168 of identical configurations are mounted. Each of the gear wheels 168 is coupled with an appropriate gear wheel 170. Each of the gear wheels 170 represents a drive wheel of the crankshaft lever system which further comprises a steering wheel 172 and a crankshaft lever 174. The crankshaft levers 174. are arranged in such a way that they rise from a retracted position to an elevated position between two adjacent rollers on the right side, at the lower surface of the mineral fiber insulating blanket 50 entering station 60 and are adapted to cooperate with the shaft levers crankshaft system cranks 160 'located on the right side, at the top of the mineral fiber insulating blanket 50 entering station 60.

Similarly, the crankshafts of the crankshafts of the crankshaft crankshaft system 160 'and 160, located on the left side, on the upper and lower surfaces of the mineral fiber insulating blanket 50 entered station 60, are

RO 112771 Bl adapted to cooperate in the manner described below.

As is evident from Fig. 6, a first set of crankshaft levers 174 ', 174, 174', 174 of crankshaft levers systems 160 ', 160, 160 and 160 is positioned between the first and second sets of crankshafts. rollers 152 ', 154' and 152, 154. Similarly, a second set of crankshaft levers is positioned between the second and third sets of rollers 152, 154 and 152, 154

The crankshaft levers in each of the six sets of crankshaft levers have the same width. Inside each of the crankshaft lever systems 160 ', 160, 160' and 160, the first crankshaft is the widest lever and the width of the crankshaft in each crankshaft system is reduced from the first crankshaft from crankshaft to the sixth crankshaft lever located under the sixth set of rollers 56 '. 58 '.

Using the motors of the crankshaft assemblies 160 ', 160, 160' and 160, the crankshaft levers of a particular set of crankshafts rotate in sync with the other three crankshaft levers remains of the respective crankshaft set. The crankshaft levers of all six sets of crankshaft levers are in addition synchronized and synchronized with the input speed of the mineral fiber insulating blanket 50 at station 60. The widest set or the first set of crankshaft levers is adapted to initiate folding of the mineral fiber insulating blanket 50, as the crankshaft levers 174 and 174 belonging to the crankshaft levers systems 160 and 160 respectively are raised from the underside of the mineral fiber insulating blanket 50 and are brought into contact with the lower surface of the mineral fiber insulating blanket 50, and the crankshaft levers 174 'and 174' of the crankshaft lever systems 160 'and 160' respectively are simultaneously lowered from the position above the upper surface of the mineral fiber insulating blanket. 50 and brought into contact with the upper surface of the insulated blanket mineral fiber re 50.

Continued rotation of the output shafts 166 ', 166, 166 and 166 causes the crankshaft levers in the first set of crankshaft levers to be moved to the center of the mineral fiber insulating blanket 50, producing a central fold of the mineral fiber insulating blanket 50. When the crankshaft levers of the first set of crankshaft levers reach the central position, the crankshaft levers in the crankshaft systems 160 'and 160 are raised while the crankshafts of the crankshaft systems 160 and 160 are lowered and as such removed from contact with the upper and lower surface respectively of the mineral fiber insulating blanket 50.

When the mineral fiber insulating blanket 50 moves further through station 60, the next set or the second set of crankshaft levers generates the second and third folds of the mineral fiber insulating blanket 50, these second and third folds being located. by the two parts of the first fold, after the folding of the third, fourth, fifth and sixth set of crankshaft levers producing additional folds of the mineral fiber insulating blanket. As a whole, the longitudinal folding of the mineral fiber insulating blanket is produced.

Width of crankshaft levers in each set of crankshaft levers, gear ratio of gear assemblies 164 ', 164, 164' and 164, gear ratio of gear wheels 168 and 170 and the entry speed of mineral fiber insulating blanket 50 in station 60 are correlated with each other and in addition correlated with the speed of rotation of the height and longitudinal compression sections of the station, to produce the insulating blanket of mineral fibers 50 'folded longitudinally, and compressed in height and longitudinally.

Integration of the height compression section, the longitudinal compression section and the longitudinal folding section

RO 112771 Bl in a single station, as described above with reference to fig. 6, is undoubtedly dependent on the operation of the longitudinal folding shaft systems described above with respect to fig. 6. Thus, the height compression section, the longitudinal compression section and the longitudinal folding section can be separated, but the integration of all three functions reduces the overall dimensions of the production plant. In addition, it can be seen that folding the mineral fiber blanket as mentioned above with respect to Figs. 4, 5 and 6 produces a transverse compaction and compression of the blanket, further conferring a homogenization of the blanket compared to the unfolded blanket. .

in FIG. 11 is a vertical sectional view of the insulating blanket of corrugated and longitudinally folded mineral fibers 50 '. The insulating blanket of mineral fiber corrugated and longitudinally folded 50 'consists of a central core or body 28 and two opposing surface layers 24 and 26, surface layers 24 and 26 which are separated by the central core or body 28 of the insulating blanket. of mineral fibers corrugated and folded longitudinally 50 'along imaginary lines of separation 20 and 22. The surface layers of the insulating blanket of mineral fiber corrugated and longitudinally folded 50' respectively are composed of segments of insulating blanket of folded mineral fibers, segments containing mineral fibers oriented almost transversely to the longitudinal direction of the insulating blanket of mineral fibers corrugated and longitudinally folded 50 '. The mineral fiber insulating blanket longitudinally folded 50 'is obtained from the second mineral fiber insulating blanket 50 by folding this second mineral fiber insulating blanket 50, possibly after compacting the second mineral fiber insulating blanket 50 as will be described. further with reference to fig. 8 and the general orientation of the mineral fibers of the second mineral fiber insulating blanket 50 is consequently maintained in the insulating blankets of mineral fiber corrugated and longitudinally folded 50 ', segments which together constitute the layers of surface 24 and 26

The central core or body 28 of the longitudinally folded and folded mineral fiber insulating blanket 50 'is composed of segments of the longitudinally folded and folded mineral fiber insulating blanket 50', segments that are folded perpendicularly to the segments of the surface layers 24 and 26 of the insulating blanket. from mineral fibers 50 '. The mineral fibers of the central core or body 28 of the longitudinally folded and folded mineral fiber insulating blanket 50 'are consequently oriented, virtually perpendicular to the longitudinal direction, as well as the transverse direction of the insulating blanket of longitudinally folded and folded mineral fiber 50'.

The insulating blanket of mineral fibers corrugated and folded longitudinally 50 'shown in fig. 7 and produced according to the process variant mentioned with reference to figs. 3, 4, 5 and 6 is further processed in the station illustrated in fig. 7, station in which the surface layer 24 is separated from the central core or body 28 of the insulating blanket. of mineral fibers corrugated and folded longitudinally 50 'along the imaginary separation line 20, shown in fig. 11. The surface layer 24 is separated from the remaining part of the mineral fiber insulating blanket by means of a cutting tool 72, after which the remaining part of the mineral fiber insulating blanket is placed on and carried by a conveyor belt 70. The cutting tool 70 72 may be a stationary cutting tool or a knife, or it may be a transversal cutting tool. The surface layer 24 separated from the mineral fiber insulating blanket is removed from the path of the remaining part of the mineral fiber insulating blanket by means of a conveyor belt 74 and is transferred from the conveyor belt 74 to three sets of rolls formed by a first set of rollers 76 'and 78', a second set of rollers 76 and

RO 112771 Bl and a third set of rollers 76 'and 78', the three sets of rollers together constituting a compaction and compression section similar to the second section of the corresponding station described above with reference to fig.2.

in FIG. 8 shows a transverse compression station which is marked with the mark 80 as a whole. In station 80, the central core or body 28 or, alternatively, the insulating blanket of mineral fibers corrugated and longitudinally folded 50 ', produced in one of the stations described above with reference to figs. 3, 4, 5 and 6, is brought in contact with two strips 15 conveyors 85 and 86, which define a constraint zone in which the mineral fiber insulating blanket is forced to compress transversely and in contact with a total of four rollers that move to 20 the surface of the blanket 89a, 89b, 89c and 89d which together with similar rollers, not shown in the figure, located opposite to the rollers 89a, 89b, 89c and 89d are used to assist in carrying out 25 a transverse compression of the central core or body 28. The conveyor belts 85 and 86 are supported by rollers 81, 83 and 82, 84 respectively.

From the 80 transverse compression station 30, remove a central core or body 28 'compressed transversely and compacted. while the central core or body 28 is transmitted through the transverse compression station 80 and transformed into the central core or body 28 'transversely compressed, the core or body is supported on the rollers, namely on the inlet roller 87 and the output roller 88 .

Although the central core or body 28 40 entered in the transverse compression station 80 is preferably constituted by the central core or body described above separately from the mineral fiber insulating blanket 50 ', as described above 45 with reference to FIG. 7, In another embodiment, the mineral fiber insulating blanket 50 'may be processed in the station 80 shown in fig.8.

In case the central core or body 50 or mineral fiber insulating blanket 50 'which undergoes transverse compression in station 80 is provided with a top surface layer, such as foil 99 described above with reference to FIG. 3 , the foil must have a structure compatible with the transverse compression of the blanket assembly with the foil. Thus, the foil applied to the upper surface of the mineral fiber insulating blanket 50, as shown in FIG. 3, must be compressible and adaptable to the reduced width of the central core or body 28 'transversely compressed or of the compressed mineral fiber insulating blanket. transversely at the exit of station 80 of transverse compression.

After compacting the separate surface layer 24, as described above with reference to Fig. 7, the compacted surface layer 24 is brought back to the remaining part of the mineral fiber insulating blanket or to its central core or body, which preferably has already been transversely compressed, as described above with reference to FIG. 8, and glued in face-to-face contact with the upper surface of the central core or body 28, as shown in FIG. 9.

in FIG. 9, a set of rollers formed by the roll 79 'and the roll 79 placed on the top and respectively below the surface layer 24 constitute a set of rolls, with which a surface film 99' obtained from a roll 98 is applied 'on the upper surface of the compacted surface layer 24. From rollers 79' and 79, the surface layer 24 which constitutes an integral mineral fiber insulating blanket with greater compactness compared to the central core or body 28, is directed towards the surface upper of the central core or body 28 by means of two rollers 77 'and 77. The roll 77 is located below the surface layer 24 and constitutes a direction change roll while the roll 77', which is located above the upper surface of the roll layer. surface 24, aims to press the compacted surface layer 24 in front contact

RO 112771 Bl in front of the upper surface of the central core or body 28, which is supported and transported by means of the conveyor belt 70 also represented in FIG. 7. After the layered surface layer 24 has been arranged in face-to-face contact with the upper surface of the central core or body 28, an insulating blanket assembly of mineral fibers is obtained. In FIG. 9, another foil 99 is represented by a dotted line. This foil is fed from the roll 98. The foil 99 may be a continuous foil or a sieve foil, ie a foil similar to the surface foil 99 'described above. however, it should be noted that sheets 99, 99 'and 99 are optional features and may be missing when an integral blanket structure 2c of mineral fibers is produced. It is also possible that one or more of the sheets indicated above, or all the sheets, may be used in the various embodiments of mineral fiber insulating blankets produced according to the process of the invention.

It should be understood that the compacted surface layer 24 which is separated from the mineral fiber insulating blanket 50 'as shown in Fig. 7, 30 may in another embodiment be supplied from a separate production line, for that one of the production stations shown in fig.3, 4, 5 and 6 can communicate directly with the production station shown in fig.9, possibly 35 through the production station shown in fig.8, thus eliminating the production station shown in Figure 7. Preferably, the production station represented in FIG. 7 is adapted to separate two surface layers from 40 central core or body 28 to produce two separate surface layers that are taken from the opposite surfaces of the central core or body 28, surface layers that are processed 4 5 according to the process described above with reference to fig. 7 for the formation of two surfaces of high compactness surface which, according to the technique described above with reference to fig. 9, are joined by 50 central core or body 28 on its two opposite surfaces. , producing a sandwich in the central system of the central core or body 28, which had previously been preferably transversely compressed as described above, with reference to FIG. 8, between two opposite surface layers similar to the surface layer 24 shown in Figure 9.

in FIG. 10, the mineral fiber insulating blanket assembly 90 is moved through a curing station represented by a curing oven or curing furnace formed by opposing curing sections of sections 92 and 94, which generate heat for heating the insulating blanket assembly. mineral fibers 90 at a high temperature so as to cause hardening of the heat-bonding agent existing in the mineral fiber insulating blanket assembly and to determine that the mineral fibers of the central core or body of the assembly and the mineral fibers of the surface layer or surface layers compacted to bond to each other so as to form a completely bound mineral fiber insulating blanket, which is cut into plate-like segments with the aid of a knife 96. if a foil 99 has been applied and possibly the continuous foils 99 ' and 99, the thermoplastic material of the sheets 99, 99 'and 99 it also melts, producing an additional binder of the mineral fibers of the mineral fiber insulating blanket. in FIG. 10 is shown a single plate segment 10 containing a central core 12 and a peak layer 14. The peak layer is made of the compacted surface layer 24, while the core 12 is made of the central core or body 28 of the insulating blanket. of longitudinally folded and folded mineral fibers 50 'shown in fig.9.

in FIG. 12 shows a fragmented and perspective view of the first embodiment of a plate-like segment of the mineral fiber insulating blanket according to the invention, noted with reference 10. The plate segment 10 consists of a central core 12 and a top layer 14, as well. and from a base layer 16 obtained

RO 112771 Bl from a surface layer of the mineral fiber insulating blanket 50. The reference 18 is given to a segment from the core 12 of the plate segment 10, a segment that originates from the central core or body 5 28 of the insulating mineral fiber blanket and longitudinally folded 50 ', central core or body which was preferably transversely compressed, as described above with reference to fig.8 ,. I in FIG. 13 shows a fragmented and perspective view of a second embodiment of a plate-like segment of the mineral fiber insulating blanket according to the invention, noted with reference 10 '. 15 As with the plate segment described above 10 of FIG. 12, the plate segment 10 'consists of a central core 12, the top layer 14 and the base layer 16. In addition, a cover 15a of the top surface 20 is provided which is made of the sheet 99' described above with reference to FIG. . 9. The top surface cover 15 may be a plastic cloth, a woven or non-woven plastic film, or 25 in another embodiment a cover made of a non-plastic material, a paper material used exclusively for design purposes and of architecture. In another embodiment, the layer 15 on the top surface may be applied 30 to the mineral fiber insulating blanket after the curing agent is warmed, ie after exposing the mineral fiber insulating blanket 90 to the heat generated by the sections 92 and 94 rendered. in Fig. 10. 35

The following are 3 examples of carrying out the process according to the invention.

Example 1. A thermally insulating plate with a structure similar to the plate shown in FIG. 12, made of a mineral fiber insulating blanket produced according to the process described above with reference to FIG. 1 ... 1 □. The plate is produced in accordance with the specifications indicated below.

The process of obtaining consists of steps similar to the steps described above with reference to FIG. 1, 2, 6, 7, 8, 9 and 10. The production output of the plant is 5000 kg / h. The weight reported to the surface of the primary blanket produced in the station described in fig. 1 is 0.4 kg / m ^a and the width of this primary blanket is 3600 mm. The density of the central core or body 28 is 20 kg / m ³ . The longitudinal compression ratios produced in two separate stations similar to the station shown in Fig. 2 are 1: 1 and 1: 2 respectively. The ratio of the cross-sectional compression produced in the station shown in Fig. 8 is 1: 2. The final plate consists of a single surface layer with a weight relative to the surface of 1 kg / m ² . The ratio of longitudinal compression of the surface layer is 1: 2. The thickness of the surface layer is 10.00 mm, and the density of the surface layer is 100 kg / m ³ . The width of the insulating blanket produced according to fig. 1 is 1800 mm.

The technological parameters used are presented in tables 1 and 2 below.

Table 1

Total thickness mm A m / min x 10 B m / min C m / min □ m / min It's m / min F 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 1 1.57 28.06 28.06 28.06 14.03 14.03

RO 112771 Bl

Continue the table

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 two hundred 11.57 19.29 19.29 19.29 9.65 9.65 225 1 1.57 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 tape 42 of the spinning chamber

B = band speed 48

C = speed of belt 70 after first longitudinal compression (fig. 2] □ = speed of belt 70 after transverse compression (fig. 8]

E = velocity of the band 70 after the second longitudinal compression [fig.2)

F = speed of the belt 70 before the hardening stove (fig.5)

Table 2

Total thickness mm G kg / m ² H kg / m ² I kg / m ² J kg / m ² K kg / m ² L 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 two hundred 1.20 1.20 2.40 2.90 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 weight of mineral fiber insulating blanket on tape 42

H = surface weight of mineral fiber insulating blanket after first longitudinal compression (fig. 2)

I = surface weight of mineral fiber insulating blanket after transverse compression (fig.8)

J = surface weight of the mineral fiber insulating blanket prior to the second longitudinal compression (fig. 2)

K = surface weight of the mineral fiber insulating blanket after the second longitudinal compression (fig. 2).

L = surface weight of mineral fiber insulating blanket Prior to hardening stove.

Bl 11 in fig. 14 is presented a diagram illustrating the correspondence between the parameters listed in table 1. The reference numbers used in fig. 14 refers to the parameters presented in table 1. 5 in fig. 15 is presented a diagram illustrating the correspondence between the parameters listed in table 2. The reference numbers used in fig. 15 refers to the parameters presented in table 2. io

Example 2. A composite roofing plate with a structure similar to that of the plate shown in fig. 12, made of a mineral fiber insulating blanket produced in accordance with the process of the invention as described above with reference to FIG. 1 ... 10. The plate is manufactured according to the specifications presented below.

The process comprises steps similar to the steps described above with reference to FIG. 1, 2, 6, 7, 8, 9 and 10. The production efficiency of the plant is 5000 kg / h.

The weight per unit area of the primary blanket produced in the station shown in fig. 1 is 0.6 kg / m ² and the width of the primary blanket is 3600 mm. The density of the central core or body 28 is 110 kg / m ³ . The longitudinal compression ratios produced in two separate stations similar to the station shown in Fig. 2 are 1: 3 and 1: 2 respectively, and the cross-sectional compression ratio produced in the station shown in Fig. 8 is 1: 2. The final plate consists of a single surface layer with a surface weight of 3.57 kg / m ² . The longitudinal compression ratio of the surface layer is 1: 2. The thickness of the surface layer is 17.00 mm and the density of the surface layer is 210 kg / m ³ . The width of the mineral fiber insulating blanket produced in fig. 1 is 1800 mm.

The technological parameters used are presented in tables 3 and 4 below.

Table 3

Total thickness mm A m / min x 10 B m / min C m / min D m / min It's m / min F 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 two hundred 1 1.57 1 1.72 3.91 3.91 1.95 1.95 225 1 1.57 10.50 3.50 3.50 1.75 1.75 250 11.57 9.51 3.17 3.17 1.59 1.59 275 1 1.57 8.69 2.90 2.90 1.45 1.45

A = speed of tape 42 of the spinning chamber

B = band speed 48

C = speed of belt 70 after first longitudinal compression [fig. 2] □ = speed of belt 70 after transverse compression [fig. 8)

E = velocity of the band 70 after the second longitudinal compression [fig.2)

F = speed of the belt 70 before the hardening stove (fig.5)

RO 112771 Bl

Table 4

Total thickness mm G kg / m ² H kg / m ² I kg / m2 J kg / rrr K kg / m ² L 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 1 1.88 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 two hundred 1.98 5.93 1 1.85 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 weight of mineral fiber insulating blanket on tape 42

H = surface weight of mineral fiber insulating blanket after first longitudinal compression (fig. 2)

I = surface weight of mineral fiber insulating blanket after transverse compression (fig. 8)

J = surface weight of mineral fiber insulating blanket before the second longitudinal compression (fig. 2)

K = surface weight of the mineral fiber insulating blanket after the second longitudinal compression (fig. 2)

L = surface weight of the mineral fiber insulating blanket prior to the hardening stove.

in FIG. 16 shows a diagram similar to the diagram in figure 14, which illustrates the correspondence between the parameters presented above in table 3.

in FIG. 17 shows a diagram similar to the diagram in FIG. 15, which illustrates the correspondence between the parameters listed above in table 4.

Example 3. The importance of subjecting the mineral fiber insulating blanket to longitudinal and transverse compression is illustrated by the data in table 5 below.

Table 5

Conventional mineral fiber insulation plates Mineral fiber insulating plates according to the invention which are not subjected to longitudinal / transverse compression Mineral fiber insulating plates according to the invention subjected to longitudinal / transverse compression Thermal insulation plate with a density of 30 kg / m ³ Pressure resistance: 2 kPa 7 kPa 9 kPa The modulus of elasticity 15 kPa 1 25 kPa 1 50 kPa Roof plate with a density of 1 50 kg / m ³ Pressure resistance 70 kPa 180 kPa 210 kPa The modulus of elasticity 600 kPa 3,300 kPa 4,000 kPa

RO 112771 Bl

The mineral fiber insulating plates according to the invention clearly demonstrate an increase in the pressure resistance and the modulus of elasticity, as compared to a conventional thermal insulating plate. The mechanical performance of the mineral fiber insulating plates according to the invention is further increased by subjecting the mineral fiber insulating blanket, from which the insulating plates are obtained, to longitudinal and transverse compression as described above with reference to FIG. 2 and 8.

Claims (27)

claims 1. Mineral fiber insulating plate defining a longitudinal direction, characterized in that it is formed of a central body, containing mineral fibers, united in face-to-face contact with a layer or two opposing surface layers containing mineral fibers. , the mineral fibers of the central body being generally arranged perpendicular to the longitudinal direction and perpendicular to the surface layer or layers, the mineral fibers of the surface layer or layers being generally arranged in a direction parallel to the longitudinal direction, the surface layer or layers having a compactness greater than the compactness of the central body, the mineral fibers in the central body and the mineral fibers in the layer or surface layers being linked together in an integrated structure only by resin-based binding agents, hardened, the hardening being carried out in a single healing process , agents that are initially present in the layers of non-reinforced non-woven mineral fibers from which the central body and surface layers are produced. Mineral fiber insulating plate defining a longitudinal direction according to claim 1, characterized in that the opposite surface layers have similar structures, framing the central body in the integrated structure. The process for obtaining the mineral fiber insulating plate of claim 1, by joining the central body with a surface layer, containing mineral fibers, characterized in that a first blanket of non-woven mineral fibers is formed, which defines a first longitudinal direction. parallel to the first mineral fiber blanket and a second transverse direction parallel to the first mineral fiber blanket, the first mineral fiber blanket containing the mineral fibers generally arranged in the second transverse direction and including a first common binding agent, the first mineral fiber blanket is moved in the first longitudinal direction of the first mineral fiber blanket, the first mineral fiber blanket is folded parallel to the first longitudinal direction and perpendicular to the second transverse direction so as to produce a second non-woven mineral fiber blanket , consisting of an ash body imaginary tral and imaginary opposite surface layers, which frame the central body as different areas due to the orientation of mineral fibers, the central body containing mineral fibers generally arranged perpendicular to the first longitudinal direction and the second transverse direction, and the surface layers containing mineral fibers arranged in generally in the second transverse direction, the second blanket of mineral fibers moves in the first longitudinal direction, a third blanket of non-woven mineral fibers is formed which defines a third direction parallel to the third blanket of mineral fibers, the third blanket of mineral fibers containing mineral fibers generally arranged in the third direction and including a second commonly used binding agent, the third mineral fiber blanket being a mineral fiber blanket with a greater compactness than the second mineral fiber blanket and being produced either separately either by cutting one of the surface layers of the first or the second mineral fiber blanket and by compacting it, the third mineral fiber blanket joins with the second mineral fiber blanket or with its central body through face contact. In the front, in order to obtain a fourth mineral fiber composite blanket, the first and second binding agents are strengthened so as to determine the mineral fibers of the fourth composite blanket. RO 112771 Bl binds to each other, resulting in an insulating blanket of mineral fibers that are cut into segments of plate. Process according to claim 3, characterized in that the third 5 blanket of non-woven mineral fibers is formed by separating from the first blanket of mineral fibers a surface segment layer, separation followed by compaction of this surface layer, or 5. Process according to the claims 3 and 4, characterized in that the step of compacting the surface segment layer is performed by folding the surface segment layer to result in the third blanket, consisting of mineral fibers oriented generally transverse to the longitudinal direction of the third blanket of fibers. minerals. The process according to claim 2C 3, characterized in that the third blanket of non-woven mineral fibers is formed by separating from the central body of one of the surface layers of the second blanket of mineral fibers and by compacting the separate surface layer. A process for obtaining the mineral fiber insulating plate of claim 1, by joining the central body with two opposite surface layers, containing mineral fibers, characterized in that a first blanket of non-woven mineral fibers is formed defining a first direction. longitudinally parallel to the first 35 mineral fiber blanket and a second transverse direction parallel to the first mineral fiber blanket, the first mineral fiber blanket containing mineral fibers generally arranged in the second 40 transverse direction and including a first common binding agent which is can strengthen, moving the first mineral fiber blanket in the first longitudinal direction of the first mineral fiber blanket, folding the first mineral fiber blanket parallel to the first longitudinal direction and perpendicular to the second transverse direction so as to produce a second blanket of non-woven mineral fibers, form both of an imaginary central body and imaginary opposing surface layers that frame the central body, as different areas due to the orientation of the mineral fibers, the central body containing the mineral fibers generally arranged perpendicular to the first longitudinal direction and the second transverse direction, and the layers surface containing mineral fibers generally arranged in the second transverse direction, the second blanket of mineral fibers moves in the first longitudinal direction, a third blanket of non-woven mineral fibers is formed defining a third direction parallel to the third blanket of mineral fibers, the third mineral fiber blanket containing the mineral fibers generally arranged in the third direction and including a second commonly used binding agent, the third mineral fiber blanket being a mineral fiber blanket with a greater compactness than the second mineral fiber blanket and being produced either separately or by cutting one of the surface layers of the first or second mineral fiber blanket and by compacting it, the third mineral fiber blanket joins with the second mineral fiber blanket or its body. centrally by face-to-face contact, a fifth mineral fiber blanket is formed similar to the third mineral fiber blanket, either separately or by cutting the other surface layer of the first or second mineral fiber blanket and compacting sa, the fifth non-woven mineral fiber blanket joins with the second mineral fiber blanket or with its central body by face-to-face contact, so as to fit into the sandwich system the second mineral fiber blanket between the third and fifth blankets. of mineral fibers to obtain the fourth composite blanket of mineral fibers, the first and second binding agents are strengthened so that cause the mineral fibers of the fourth composite blanket to bond together, resulting in an insulating blanket of mineral fibers that are cut into plate segments. Process according to the claims 3 ... 5, characterized in that the first blanket of mineral fibers is folded, to result in continuous ripples extending in the longitudinal direction of RO 112771 Bl of the first mineral fiber blanket 9. Process according to claims 3 ... 8, characterized in that the third blanket of mineral fibers is produced such that the third direction is perpendicular to the first longitudinal direction. 10. Process according to claims 3 ... 8, characterized in that the third blanket of mineral fibers is produced so that the third direction is identical to the first longitudinal direction. 11. Process according to claims 3 ... 10, characterized in that, in an initial step, the first mineral fiber blanket is formed from a basic blanket of non-woven mineral fibers, by arranging the basic mineral fiber blanket. in overlapping layers. Process according to Claims 3 ... 11, characterized in that the base blanket of non-woven mineral fibers is arranged in a generally overlapping position in the second transverse direction. 13. Process according to claims 3 ... 12, characterized in that 25 further comprises a further step of compressing at height the first blanket of non-woven mineral fibers, produced in the first stage of the process. 14. The method of claim 3, characterized in that it comprises a further step of longitudinally compressing the first blanket of non-woven mineral fibers produced in the first step and / or an additional step 35 of longitudinally compressing the blanket of the blanket. two of non-woven mineral fibers produced in the third stage of the process. Process according to Claims 3. 14, characterized in that 40 further comprises a further step of transverse compression of the second blanket of non-woven mineral fibers produced in the third step of the process. 16. The process according to claim 45, wherein it further comprises a further step of compressing the fourth layer of mineral fibers before inserting it into a curing oven. 50 17. Process according to claims 3 ... 16, characterized in that a foil is applied to one or both surfaces of the first non-woven mineral fiber blanket and / or a foil is applied to one or both surfaces. of the second blanket of non-woven mineral fibers. 18. An installation for carrying out the process of claim 3, comprising means for forming, moving, folding, compacting and cutting the blanket of non-woven mineral fibers, characterized in that it consists of an oven (30), of conveyor belts (42, 44, 46) for forming a base blanket (40) of non-woven mineral fibers and for folding it on a conveyor belt (48), transverse to its direction of movement, thus having a preliminary mineral fiber blanket (50 or 50 ') more compact, the conveyor belt (48) moving in the longitudinal direction of this blanket, which will be the first longitudinal direction of the first mineral fiber blanket (50), from a roller system (52, 54 ) for height compression of the blanket (50 ') from non-woven mineral fibers, followed by another roller system (56', 56, 56 ', 58', 58, 58 ') for longitudinal compression of the blanket (50') from mineral fibers, forming the first p non-woven mineral fiber saddle (50) defining a first longitudinal direction parallel to the first blanket (50) of mineral fibers and a second transverse direction parallel to the first blanket (50) of mineral fibers, the first blanket (50) containing the mineral fibers arranged in generally in the second transverse direction and including a first commonly reinforcing binding agent, a device (60 '), a device (60) or a roll assembly (60') for longitudinal folding, or a station (60 ) of six sets of rollers for compressing and folding the first blanket (50) of mineral fibers parallel to the first longitudinal direction and perpendicular to the second transverse direction, resulting in the second blanket (50 ') of non-woven mineral fibers, the second blanket (50' ) being made up of a central body (28) and surface layers (24, 26] opposite, which fit EN 112771 Bl the central body (28) in a sandwich system, the central body (28) containing the mineral fibers arranged generally perpendicular to the first longitudinal direction and the second transverse direction, and the surface layers (24, 26) containing the arranged mineral fibers generally in the second transverse direction, from a conveyor belt (70) for moving the second blanket (50 ') of mineral fibers in the first longitudinal direction, associated with a cutting device (72) for separating a surface layer (24). ) from the second mineral fiber blanket (50 '), from a conveyor belt (74) for deflecting the surface layer (24) separately from the path of the remaining portion of the second mineral fiber blanket (50'), of three sets of rollers (76 ', 78', 76, 78, 76 ', 78') for compacting or compressing the surface layer (24) and producing the third blanket (24) of mineral fibers defining a third direct ie parallel to the third blanket (24) of mineral fibers, the third blanket (24) containing the mineral fibers generally arranged in the third direction and including a second commonly used binding agent, the third blanket of mineral fibers (24) being a mineral fiber blanket with a greater compactness than the second mineral fiber blanket (50 '), an assembly (80) consisting of two strips and several rollers for transverse compression of the remaining part (28, 26) of the second mineral fiber blanket (50 ') after longitudinal compression in the device (60) or (60'), or in the assembly (60 ') or in the station (60], possibly of two rollers (79', 79 ") , for applying a film (99 ') on the upper face of the third blanket (24) of mineral fibers, of a roller [77] for changing the direction and a roller (77') for joining the third blanket (24) of fibers minerals with the remaining part (28, 26) of the second blanket (50 ') of mineral fibers in contact face to face, producing the fourth composite blanket (90) of mineral fibers, from compression means identical to the previous ones (52, 54, 56 ', 56, 56 ', 58', 58, 58 '), for compressing the blanket of the fourth composition (90) of mineral fibers, of stoves (92, 94) for the strengthening of the first and second binding agents, determining the binding between they consist of the mineral fibers of the fourth composite blanket (90) as well as of a device (96) for cutting the fourth hardened composite blanket (90) from the mineral fibers into plate segments (10). 19. An installation according to claim 18, characterized in that the cutting device (72) is adapted for forming the third blanket (24) of non-woven mineral fibers by separating a surface segment layer from the first blanket (50) of mineral fibers, and the roller system (76 ', 78', 76, 78, 76 ', 78') compactes the surface layer separately. 20. Installation according to claims 18 and 19, characterized in that it is provided with a means for compacting the surface segment layer by folding it, resulting in a third blanket (24) containing mineral fibers oriented generally transversely to the longitudinal direction of the blanket. third (24) of mineral fibers. 21. The plant according to claim 18, characterized in that the cutting device (72) is adapted for forming the third blanket (24) of non-woven mineral fibers by separating a surface segment layer from the second blanket (50 ') of fibers. minerals from the corresponding central body (28), and a roller system compacts the surface layer separately. 22. An installation for carrying out the process of claim 7, comprising means for forming, moving, folding, compacting and cutting the blanket of non-woven mineral fibers, characterized in that it consists of an oven (30), of conveyor belts (42, 44, 46] for forming a base blanket (40) of non-woven mineral fibers and for folding on a conveyor belt (48), transverse to the direction of movement, thus obtaining a preliminary blanket of mineral fibers (50 RO 112771 Bl or 50 ') more compact, the conveyor belt (48) moving in the longitudinal direction of the base blanket (40) which will be the first longitudinal direction of the first mineral fiber blanket (50), from a roller system (52, 54) for height compression of the blanket (50 ') from non-woven mineral fibers, followed by another roller system (56', 56. 56 ', 58'. 58. 58 '] for longitudinal compression of the blanket ( 50 ') of mineral fibers, the first blanket (50) being formed from non-woven mineral fibers which defines a first longitudinal direction parallel to the first blanket (50) of mineral fibers, the first blanket (50) containing the mineral fibers generally arranged in the second transverse direction and including a first customary reinforcing fastener, a device (60 '), a device (60) or a roll assembly (60') for longitudinal folding or a station (60) of six sets of rollers for compressing and folding the first blanket (50) of mineral fibers parallel to the first longitudinal direction and perpendicular to the second transverse direction, resulting in the second blanket (50 ') of non-woven mineral fibers, the second blanket (50') being made up of a central body (28) and surface layers (24, 26] opposite, which encloses the central body (28) in a sandwich system, the central body (28) containing mineral fibers generally arranged perpendicular to the first longitudinal direction and the second transverse direction, and the surface layers (24, 26) containing mineral fibers generally arranged in the second transverse direction, from a conveyor belt (70) for moving the second blanket (50 ') of mineral fibers in the first longitudinal direction, associated with a cutting device (72) for separating a layer of surface (24) of the second mineral fiber blanket (50 '), of a conveyor belt (74) for deflecting the surface layer (24) separate from the path so the remaining part of the second mineral fiber blanket (50 '), from three sets of rollers (76', 78 ', 76, 78, 76', 78 ') for compacting or compressing the surface layer (24), a another cutting device (72 ') for separating the other surface layer (26) from the second blanket (50') of mineral fibers, a conveyor belt (74 ') for deflecting the surface layer (26) separately from the path of the remaining central body (28), from three sets of rollers similar to the rollers (76 ', 78', 76, 76 ', 78') for compacting or compressing the surface layer (26), thus obtaining the second one the third blanket (24) and the fifth blanket (26) respectively of mineral fibers defining a third direction parallel to the third and fifth blanket of mineral fibers, the third and fifth blankets containing the mineral fibers generally arranged in a third direction and including a second commonly used binding agent, the blanket of third and fifth mineral fibers being mineral fiber blankets with a greater compactness than the second mineral fiber blanket (5O'J, an assembly (80) consisting of two strips and several rollers for transverse compression of the central body (28 ) or the second blanket (50 ') of mineral fibers after longitudinal compression in the device (60') or (60), or in the assembly (60 ') or in the station (60), possibly of two rollers (79', 79 ) for applying a sheet (99'J on the upper face of the third blanket (24) of mineral fibers, of similar groups of two rollers for applying sheets on the lower face of the fifth (26) blanket of mineral fibers and / or on one or both sides of the central body (28), from a roller (77) for changing direction and a roller (77 ') for joining the third blanket (24) of mineral fibers with the central body (28) in contact with the front in front, from similar rollers for changing direction and joining the fifth (26) di n mineral fibers with the central body [28] on the other face, also in contact face to face, so as to fit the central body (28) or, optionally, the second layer of mineral fibers, from compression means identical to the previous ones (52 , 54, 56 ', 56, 56, 58', 58, 58 ') RO 112771 Bl for compressing the fourth composition (90) of mineral fibers, of stoves (92, 94) for strengthening the first and second binding agents, determining the binding of the 5 mineral fibers of the fourth composite blanket ( 90) as well as from a device (96) for cutting the fourth layer of reinforced composites (90) from mineral fibers into plate segments (10). io 23. Installation according to claims 18 ... 22, characterized in that the devices (60 *, 60, 60 ', 60) are adapted for folding the first blanket (50) of mineral fibers so as to produce 15 continuous ripples that extend in the first longitudinal direction of the first blanket (50). An installation according to claims 18 .. 23, characterized in that the third blanket (24) of mineral fibers is produced such that the third direction is perpendicular to the first longitudinal direction. 25. An installation according to claims 18 ... 23, characterized in that the third blanket (24) of mineral fibers is produced such that the third direction is identical with the first longitudinal direction. 26. Plant according to claims 18 ... 25, characterized in that the furnace (30) and the conveyor belt system (42, 44, 46) are adapted to form a base blanket (40) of non-woven mineral fibers. and for arrangement in overlapping layers. 27. The plant according to claims 18 ... 26, characterized in that the furnace (30) and the conveyor belt system (42, 44, 46) are adapted to arrange the base blanket (40) of non-woven mineral fibers in the a position of overlap, in general, in the second transverse direction.