FR2531377A1 - Steel-aluminium. - Google Patents

Abstract

The invention to be protected relates to a mechanical process for adhesively bonding bitumen felts, which are protected by metallic coverings, onto backings (supports) which are metallic or otherwise and can be used in the building industry. The use of bitumen felts for protecting the insulation, overcoming infiltrations, making up impervious flashings, canting strips (flashing members), protecting frames, etc., has been known for a very long time. By contrast, it does not seem, given the research carried out, that the arrangement of bitumen felts has been discovered, nor are the thermal and acoustic advantages known which such treated elements may afford. It is certain that many users will have the possibility of making up, in the manner of a craftsman, similar assemblies and that these plagiarisms will escape all controlling thereof.

Description

 The process described makes it possible to obtain special elements entering into the construction of buildings and in particular roofing coverings, cladding panels, facade coverings panels, insulating panels, to protect many structures.

 These various elements are obtained by joining on the two faces of any support, asphalt felts, one of the faces of which can be protected by a metallic film "aluminum - copper - zinc or any other material including plastics". These protective coatings can be smoothed - embossed - colored.

In the case of certain supports which only need to be protected against the effects of corrosion, this treatment will only be carried out on one side of said support.

 Thanks to this treatment, the elements obtained will be protected firstly against the effects of time and secondly. Will acquire both thermal and phonic insulation properties which they do not possess. The acquired properties will manifest themselves particularly, in the thermal domain, when the two outer faces of these felts are equipped with. aluminum sheets of natural or colored hues. Title of the aluminum used: 99.5. Sheet thickness 0.08 m.

The supports that can be used and benefit from this treatment are numerous and although the following list is not exhaustive, it is indicated
- Cold-rolled or electro-galvanized steel sheets, with smooth or granite surfaces, presented in the form of a ribbon or in sized sheets.

 - Aluminum sheets and similar alloys ribbed or not.

 - Metal or plastic screens.

- Fiber cement sheets and panels
- Compressed asphalt panels.

 - Natural or reconstituted wood panels.

 - Various plastic panels or cardboard or canvas, rigid or not.

- Various structures used in buildings and in particular all complementary elements such as ridges, banks, valleys, channels, downspouts, IPN, beams, posts etc.
The assembly of the felts on the supports will be carried out hot by means of a train of rollers, train having some resemblance to a profiling train.

 The asphalt felts presented flat pass between a series of pebbles, ribbed in some cases, where they adopt the shapes of the supports on which they will be glued.

 Given the low mechanical resistance that the felts will exert during the preforming operations, these rollers will rather be hollow cylinders, half of which will be insulated. Only the cylinders in contact with the metal side of the felts will be heated. The felts will be brought to a temperature close to their softening point. The supports, especially metal sheets, will also be preheated using suitable cylinders.

 Before the supports and lower faces of the felts come into contact, a jet of oxidized asphalt brought to high temperature will be sprayed on the various faces present. The assembly, preformed, will then pass through compression rollers which will have the purpose of preventing any formation of air pockets, to regularize the thickness and to ensure compaction which increases the rigidity of the element obtained. On leaving the compression rollers, the finished element will be cooled by ventilation.

 The reliability of the plates obtained (roofing and cladding plates) requires that all the edges of said plates be protected from corrosion.

To achieve this result, the felts will be sized before gluing.

 In the longitudinal direction the metal part of the felt will protrude by 2 to 3 centimeters from the lateral edges of the plates to be treated, to be rolled up and welded on their underside. In the transverse direction, the two felts will have a sufficient projection allowing them to be welded together. The bead formed by the reusion of the two felts could be further processed and crimped.

 During manufacture it will be possible, moreover, to place in the longitudinal direction of the plates and under the wave intended for the covering, an asphalt tongue which, interposing between the covering waves during the installation on the roof, will seal office. A simple heating of this part of the plate should cause effective adhesion to the parts present.

 The thicknesses of the felts will be variable. If the thickness of the felt placed on the underside of the plate will be of the order of 1 mm, the thickness of the felt which will act as "skin" may vary from 2 to 10 mm. An 11 mm thick felt applied to a steel sheet provides a lambda of about 0.10. Increase the thickness of the felts used to obtain more valid conductivity coefficients than that reported above, but more convincing results could be obtained1 by gluing, always on the upper face of the support, two felts of the same constitution, c 'is to say two felts, fitted with an aluminum coating. In this presentation, a metal sheet would be sandwiched between two asphalt parts. Given the behavior of aluminum sheets during heat exchanges, the lambda of such a complex would probably be lower than that of 0.10.

 This feature (superposition of two felts on the outside) could also be popularized to increase the mechanical resistance of a support.

One of the two felts used, the one that would adhere to the support, could be reinforced by the interposition of a metallic canvas or mesh. This device, used on fiber cement sheets, would increase the impact resistance and the impact on breakdowns of said sheets.

Claims (1)

 - CLAIMS  The reliability of the elements obtained according to the method described, will depend on the manufacturing process making it possible to prevent the creation of air pockets between the components. This can only be achieved with a roll forming machine. The use of presses to obtain similar elements which cannot lead to the same results.  Different machines for treating all the supports that can benefit from this arrangement will therefore be necessary. Those allowing the obtaining of ribbed plates which cannot be identical to those which would allow the manufacture of elements for facades of channels or ridge or even the protection of profiles or pipes.  That said, the patent applied for relates to the process which consists in gluing two asphalt felts on the two faces of a support in the case of plates and panels, and not the various machines which will allow these presentations.  Equipping a support requiring only the use of a single asphalt felt in order to protect it against the effects of corrosion should also benefit from the patent guarantee.