LU82560A1 - THERMAL-INSULATING WEAPON ELEMENT AND MANUFACTURING METHOD THEREOF - Google Patents

Description

i 2

The present invention relates to a reinforced heat-insulating element intended in particular to form a roofing panel.

The aim of the present invention is to propose a reinforced thermo-insulating element for multiple use in construction such as roofing panel, industrial sub-roofing panel, wall for prefabricated application, lost formwork for floor slab, etc.

Among the aforementioned applications, especially the use as a roof panel is of particular interest.

Indeed, the reinforced thermal insulating element has, for this specific application, considerable advantages compared to the roof panels known up to now.

This element makes it possible to considerably reduce the structural labor, while ensuring, thanks to its ease of installation, a perfect finish independent of the quality of the labor.

To this end, according to the invention, the heat-insulating element comprises a plate of heat-insulating material, in particular of polyurethane foam, containing a frame projecting from at least one of the faces of the plate.

In the case of a roofing panel, the protruding parts of the frame form means for fixing the tiles, slates or the like.

* Advantageously, the frame is formed ;; by a trellis, in particular a metallic trellis.

. £

According to a particularly advantageous embodiment of the invention, the trellis has longitudinal bars having a wavy appearance,.

/ 3 /

J

3. -V "i'i - · Ÿ extending along substantially parallel planes, and straight transverse bars substantially perpendicular to these planes.

The invention also relates to a particular method for manufacturing the aforementioned heat-insulating reinforced element.

This process is characterized by the fact that, in a layer of polymers obtained from a liquid reagent which, during an expansion phase, forms a foam, we introduce, towards the end of this expansion phase, an armature, so as to obtain a partial penetration of the latter into the foam and to achieve sufficient cohesion of the armature-foam complex, while making it possible to maintain a projecting part of the armature relative to the layer of polymers after solidification of the foam.

According to a preferred embodiment of the method according to the invention, a continuous strip of polymer foam is produced from the above-mentioned liquid reagents on a conveyor driven in a substantially continuous movement and the reinforcement is introduced into the foam towards the end of the expansion phase by unrolling it continuously above said strip at a speed substantially similar to that of the conveyor and in the same direction. as the latter, so as to penetrate this frame partially into the foam formed as the strip advances.

Other details and particularities of the invention will emerge from the description given below, by way of nonlimiting example, of some embodiments of the heat-insulating reinforced element according to the invention and of the method of manufacturing this one.

/ / / .// if! ' ·· 4

Figure 1 is a perspective view of a reinforced heat-insulating element forming a roofing element placed on rafters.

FIG. 2 is a longitudinal section, on a larger scale, of a detail in FIG. 1.

Figure 3 is a perspective view of another embodiment of a heat-insulating reinforced element forming a roof panel.

"'- Figure 4 relates to a different arrangement of the variant according to Figure 3 as a roof element.

FIG. 5 is a detailed view of FIG. 4.

Figure 6 relates to a perspective view of yet another way of using the element according to Figure 3 as a roofing panel.

Figure 7 is an elevational view in longitudinal section schematically showing a particular embodiment of the method of manufacturing a reinforced thermal insulating element.

In the various figures, the same reference numerals designate analogous or identical members.

Although the present invention is not limited to a reinforced thermal insulating element applied as |! | * roof panel and concerns an element that can be j! used for other applications, as already mentioned below Γ **

IF

I above, the present description will however be essential-

It is directed towards this particular application.

Thus, in FIGS. 1 to 6, various embodiments of the thermo-reinforced armored element have been shown as panels for covering inclined roofs.

FIG. 1 shows a heat-insulating element comprising a plate made of insulating material 1, in particular made of polyurethane foam, containing a frame 2 which has a projecting part 3 on the face 4 of this plate.

This reinforcement has a wave-like appearance, the crests 5 of which protrude relative to the plate 1 on the side of the face 4.

The frame 2 is formed by a trellis, such as a galvanized or plasticized metallic trellis ^ having longitudinal bars 6 having this wavy appearance and extending in planes substantially parallel at constant distances from each other, these folded bars 6 being interconnected by straight transverse bars 7 extending substantially perpendicular to these parallel planes.

At least the transverse bars 7 ′ located outside of the plate 1 and the most spaced from the latter, ie. located at the crests 5 of the corrugations, are fixed to the bars 6 on the outside of the latter, ie. opposite to plate 1.

In the embodiment shown in 1 Figures 1 and 2, the corrugations have an identical sawtooth shape so that the axes of the bars 7 'fixed on the ridges 5 of these saw teeth extend in a plane 8 parallel to plate 1.

These bars 7 'form support and fixing or attachment members for tiles 14, slates / or the like intended to cover the roof. / r (/ jr 6

The plague 1 rests directly on rafters 9 of the roof frame, while the bars 7 ‘act as purlins of traditional frames.

Advantageously, the face of the plate 1 opposite to that having the projecting part of the frame 2 has a coating 10 formed for example by an aluminum foil lined with paper so as to be able to reflect the heat. If this face is visible, it may have a decorative appearance or even be formed of a rigid finishing plate.

Furthermore, a protective film 11 can extend at least over the face of the plate 1 with respect to which the armature 2 projects, ie. opposite to that having the coating 10. This film preferably also extends over the projecting reinforcement to serve as protection against corrosion.

Figure 3 relates to another embodiment of the reinforced thermal insulating element according to the invention and differs from that shown in Figures 1 and 2 by the folding shape of the lattice. constituting the frame 2.

This trellis has zones 12 extending in the above-mentioned plane 8 which is substantially parallel to the plate 1. These zones are kept at the desired distance I - from the plate 1 by folded parts 13 of the intended trellis | at regular and partially embedded distances

In plate 1.

This embodiment has the advantage of being able to serve for several types of tiles · or slates. · 7 Y.

Thus, if we place the roof panel so that the corrugations of the trellis extend in the direction of the rafters 9, as in Figure 3, we can, in principle, use any type of slate and conventional tile .

On the other hand, if, as in FIG. 4, the roofing panel according to the invention is placed so that the undulations of the trellis extend in the longitudinal direction of the ridge, a tile-channel 14 can be used, as shown in figure 4.

Yet another possibility offered by this type of panel is that it allows the fixing of purlin slats 16 by means of hooks 17 adapting to the bars of the trellis located in the zones 12 thereof.

It should also be noted that if the panels are placed in the direction shown in Figures 3 to 5, they can rest directly on the purlins 18, given the good resistance to bending of the panels in the transverse direction to the waves of the trellis.

Although the dimensions of the roof panels according to the invention can vary within relatively wide limits, it is however important that they can be handled on the roof by two men, so that advantageously the weight of a panel from 6 to 7 m2 should not exceed 40 kg.

With regard to rigidity, it must be able to support a normal load of cover but especially the overload represented by a man carrying tiles, that is to say approximately 120 kg distributed on approximately 4 dm2.

A roof panel reinforced with trellis / metal according to the invention meeting the requirements / / /// tf 8 y

T

above, of the sawtooth lattice type, has the following characteristics: - Lattice made of wire with a diameter of 2 mm, theoretical mesh 50 mm., free height 40 mm., total height 50 mm., distance between the crests 5 + 83 mm.

- Thermal insulation plate with a thickness of 40 mm. made of hard polyurethane foam.

- Dimensions of the panel: 1.20 mx 2.5 m.

As already indicated above, the present invention also relates to a particular method of manufacturing these panels.

In a polymer layer obtained from liquid reagents which, in the case of polyurethane plates 1, consist essentially of polyol and isocyanates and which, during an expansion phase form a foam, are introduced, towards the end of this expansion phase, a reinforcement so as to obtain a controlled partial penetration of the latter into the foam over a relatively constant height and to achieve sufficient cohesion of the reinforcement-foam complex * while making it possible to maintain a projecting part 3 of ; the reinforcement 2 relative to the polymer layer 1 after I solidification of the foam in the form of a plate 1.

Although the reinforced thermal insulating element according to the invention can be manufactured as well in! ”Discontinuous that in continuous, a pronounced preference is given to the continuous process and, in this respect, a form ¥

The particular embodiment of this continuous process is illustrated schematically in FIG. 7.

| According to this process, we spread, by | of a casting head 18, the liquid reactants 19 on an I Λ / / \ r.

9 sheet of Kraft paper 20, optionally covered externally with an aluminum film ^ mistletoe is unwound from a reel 21 above a conveyor 22.

The sheet 19 and the conveyor 22 move at substantially the same speed in the direction of the arrow 23.

During this advancement, the reagents react with each other by expanding in the form of a foam -24.

Towards the end of the expansion phase, i.e. when the foam has reached approximately its final height, the frame 2 is introduced into the foam to a precalculated depth so as to maintain above this layer of foam a projecting part of the frame.

The frame is formed by a continuous trellis which has been folded beforehand and which turns around a roller 30 mounted above the conveyor 22, at the place where the expansion phase ends. This roller rotates in the direction of arrow 31 at a circumferential speed analogous to the speed of the conveyor 22 so as to make the mesh partially penetrate into the foam formed as it advances on the conveyor 22.

In this way, the surface of the foam, into which the mesh penetrates, has undergone a minimum of disturbance.

Advantageously, in certain cases, it is important to form, on the side of the foam having the part of the projecting frame 3, a protective film on the visible face of the foam. In addition, this film can extend over this projecting part even so as to form, for example, corrosion protection.

This film can, for example, be applied after the foam has hardened or even after these continuous strips have been cut into panels of predetermined dimensions. Thus, one could possibly extend this protective film on the cutting edges of these panels.

The sheet 20 could, for certain applications, be replaced by a rigid plate having, for example, fire-fighting properties, such as a gypsum plate.

As already indicated above, the present invention is not limited to a reinforced heat-insulating element intended to be used as a roofing panel.

Indeed, this element could, for example, be used as an industrial roofing by hanging the panels by means of the projecting part 3 of the frame 2

Below a frame.

Another application is that as a wall for prefabricated dwellings where the trellis would provide both the rigidity and the reinforcement of a facing plaster.

Finally, this reinforced thermo-insulating element is also perfectly suited for a floor slab - in which the trellis is part of the reinforcement of the slab or of a screed.

It is understood that the invention is not! not limited to these various embodiments and that | many variants could be envisaged without departing from the scope of this patent, both for what I do the shape and dimensions of the frame for this /! / /

Lj / "^ / t 11 mistletoe relates to the manufacturing process of these reinforced heat-insulating elements and the nature of the heat-insulating material used. The latter can be made of polyurethane foam, as already mentioned above, including polyisocyanurate, etc. Z / Z / 7!.

/ * ï:

Claims (21)

1.- Reinforced thermo-insulating element, characterized in that it comprises a plate of heat-insulating material 1, in particular of polyurethane foam, containing an armature 2 projecting from at least one of the • faces of the plate 4. 2. Element according to claim 1, 'characterized in that the frame protrudes at substantially regular distances on at least one of the faces of the aforesaid plate. 3. Element according to either of Claims 1 and 2, characterized in that the reinforcement has a shape in the form of undulations, the crests 5 of these undulations projecting at least from one side of the plate. . 4. Element according to any one of claims 1 to 3, characterized in that the frame is formed by a trellis, such as a metallic trellis. 5. - Element according to claim 4, characterized in that the trellis has longitudinal bars 6 having this wavy appearance, extending in substantially parallel planes, and straight transverse bars 7 substantially perpendicular to these planes. 6. Element according to claim 5, characterized in that at least the transverse bars 7 ′ situated outside the plate and the most spaced from the latter are fixed to the longitudinal bars on the side of the latter opposite to the plate. 7. Element according to claim 6, characterized in that the aforesaid transverse bars form fixing members. - 1 'i /; 13 8. Element according to any one of claims 4 to 7, characterized in that the trellis has a wavy shape in the form of saw teeth. 9. Element according to any one of claims 4 to 7, characterized in that zones 12 of the trellis extend in a plane substantially parallel to the above-mentioned plate and are held at a certain distance from the latter by folded parts of the pre-= mesh - seen at regular distances and partially embedded in the plate. 10. Element according to any one of claims 1 to 9, characterized in that the plate of insulating material is provided, on the side opposite to that having the protruding frame, with a coating 10. 11. Element according to any one of claims 1 to 10, characterized in that it has a protective film 11 extending at least on the face of the plate relative to which the frame projects. 12. Element according to any one of the preceding claims, characterized in that it constitutes a roofing panel, the projecting armature comprising fastening members for the attachment of a re-! - covering formed e.g. by tiles, slates, etc. 13. Reinforced thermosetting element, in particular roofing panel as described above or shown jh in the accompanying drawings. 14, - Process for manufacturing the heat-insulating armored element according to any one of Claims 1 to 13, characterized in that, in a layer of polymers, obtained from liquid reagents which '/ / during a phase expansion form a foam, a reinforcement is introduced towards the end of this expansion phase, so as to obtain a partial penetration of the latter into the foam and to achieve sufficient cohesion of the reinforcement-foam complex while allowing to maintain a projecting part of the reinforcement relative to the layer of polymers after solidification of the foam. 15. The method of claim 14, characterized in that a continuous strip of polymer foam is produced from the aforementioned liquid reagents on a conveyor animated with a substantially continuous movement and in that the reinforcement is introduced into the foam towards the end of the expansion phase by unrolling it continuously above said belt at a speed substantially similar to that of the conveyor and in the same direction as the latter, so as to make this reinforcement partially penetrate into the foam formed as the strip advances. 16. Method according to either of claims 14 and 15, characterized in that the foam layer is formed on a support intended to be integral with the foam and constituting a coating. 17. The method of claim 16,. characterized in that the aforementioned support has, on the side opposite to the foam, a heat reflecting face. 18. Method according to either of claims 16 and 17, characterized in that the support is substantially rigid. 19. A method according to any one of claims 14 to 18, characterized in that the armature / consists of a continuous lattice having undergone a ~ / V \: deformation in the form of corrugations prior to its partial introduction in the foam. 20, - Method according to any one of claims 14 to 19, characterized in that one forms, on the side of the foam having the projecting frame, a protective film extending at least over the foam. 21. Method of manufacturing a heat-insulating reinforced element as described above or shown in the accompanying drawings. :: ...... I ............ Ab - d: '. T. . v! raçe de ..J.0 ......... pages of ci rsc. concept ........ ft. .... reseller icaiiono ....... A ......... short description Vixr mbourp,! s: m / fid’atçire: f, Â v Charles München