BE481039A - - Google Patents

Description

       

  THE MINISTER OF ECONOMIC AFFAIRS AND MIDDLE CLASSES,

  
Considering the law of March 30, 1948, amending the decree-law of July 8, 1946, extending, because of the events of war, the deadlines in matters of industrial property and the duration of patents for invention.

  

 <EMI ID = 1.1>


  
Considering the decree-law of July 8, 1946, extending due to the events of war, the deadlines in matters of industrial property and the duration of invention patents, modified by the law of March 30, 1948;

  
Having regard to the Union Convention for the Protection of Industrial Property;

  
"Insulating panel and its manufacturing processes and equipment".

  
The present invention relates to a method

  
for manufacturing panels intended more particularly to absorb sound and temperature variations, these panels being perforated according to standards which will be developed further.

  
The invention also relates to a new apparatus making it possible to conveniently, quickly and advantageously manufacture some of these panels, so that the latter have entirely new characteristics.

  
Finally, the patent covers new industrial products made up of the panels themselves, as obtained by the process and from

  
 <EMI ID = 2.1> Some manufacturing devices are known

  
panel ;; insulators obtained by pouring bodies such as plaster or cement into molds provided for this purpose. Such panels have also been made with different races such as iron or aluminum, or with materials :; such as fiber cement, plywood, reconstituted wood, etc.

  
A considerable amount of work was carried out more recently when plaster, staff or cement panels were manufactured, constituting perforated panels, covering a mattress of glass wool interposed between them; but the practical realization of such panels still suffered

  
of the obligation to cast the plaster or

  
cement without completely coating the intermediate mattress

  
 <EMI ID = 3.1>

  
always difficult.

  
Finally, the perferations of panels such as those already produced by the applicant or obtained according to other devices, brought the inner mattress of glass wool, paper-cardboard, light felt, various fibers, etc. into contact with the atmosphere.

  
The panels obtained according to the present invention can have perforations on one side or on both sides; these perforations can either reach the internal fibrous mat, or, on the contrary, keep, between this mat and the other thickness, a diaphragm of plaster or cement, the thinness of which can be adjusted.

  
It is known that the existence of such diaphragms reinforces the variety of acoustic absorption of the panel, its decorative possibilities, protection and maintenance.

  
As for the process and the apparatus for obtaining

  
hold these panels, they are such that we can ensure

AT

  
satisfactory manufacture in horizontal or vertical molds according to the molding requirements of the various bodies, those requiring for example vibration.

  
In addition to the new characteristics which have just been explained, the process and the apparatus which will be described make it possible to obtain panels offering this essential characteristic of completely coating a fiber panel in the cast material (for example

  
felt) previously reinforced and, if necessary, waterproofed, and in such a way that its reinforcement gives it a coefficient of solidity and, in addition, elasticity, particularly advantageous in terms of sound absorption.

  
In the drawings opposite, two embodiments of the invention have been shown by way of nonlimiting example; we see :

  
 <EMI ID = 4.1>

  
tion of a panel in a horizontal mold, the mold being open.

  
Fig. 2, / perspective of a vertical manufacturing mold, the mold cover being removed. Fig. 3 a transverse vertical section of the mold <EMI ID = 5.1> Fig. 3a, variant of FIG. 3. FIG. 4, the perspective of a panel obtained according to the process described in FIG. 3. <EMI ID = 6.1> able to be closed by a locking 3 so as to fit a base 4 provided with operating handles 12 and
12 '; this base can bear protrusions 5, frustoconical or truncated ellipsoids, experience having demonstrated the advantage of the latter form for acoustics, cleaning, and for fixing to the surface

  
n panels of the belts, substances or coatings of the partitions; some of these plasters are

  
more particularly intended to improve the acoustics of rooms, so that the shape of the projections 5 constitutes an additional original element, perfecting

  
sound system for the premises.

  
A cover (not shown) itself provided with projections similar to the projections 5, is on the box thus prepared after the product intended for it has been poured.

  
to form the panel, for example cement or plaster.

  
The latter (or their mixture with products such as pozzolana) will therefore form a panel presenting,

  
on one or two sides, perforations corresponding to the projections 5.

  
In addition, we will have the opportunity to sink first

  
the product in sufficient quantity to flood the projections and cover the tops with a thin film, the thickness of which may vary at the discretion of the manufacturer. On this casting can be placed a sheet of felt, glass wool, etc., over which will finally be poured the

  
rest of the product, so as to fill the box in which the cover will be replaced. When stripping, a panel will be obtained which completely surrounds the internal fibrous plate and pierced with compartments which may not reach this fibrous plate, or on the contrary reach it.

  
It will even be possible to manufacture such a panel with perforations which do not reach the inner fibrous mat, and only some of which will then be finished with an automatic gouge.

  
We could still ensure the manufacture of perforations, only some of which would remain blind,

  
n by giving the protrusions of the box and the cover different lengths.

  
We see, in Figures 2, 3 and 3a (vertical mold), a base 6 supporting two large vertical partitions

  
 <EMI ID = 7.1>

  
rectangular parallelepiped in which the plaster, cement, etc. will be poured. The panels 7 and 7 'may have projections 5 like the panels 4 and in FIG. 1; these protrusions will benefit from the same characteristics as the previous ones as to their shape, their profile and their length, and a cover 8 will possibly be provided to complete the molding if necessary.

  
In a certain previously known similar mold, with which panels such as those in question are made, in the preamble, a parallelepipedal core was provided in the molds, so as to leave a cavity for demolding the interior padding. fibrous.

  
According to the present invention, this core is removable so that it can be replaced by the reinforced felt itself. This felt 9 can in fact be supported by a

  
 <EMI ID = 8.1>

  
so as to provide the mattress 9 with the required tension. This mattress is placed before the plaster is poured, and can be maintained at the desired height by rods 11 which can play the role of sealing or struts from one face to the other of the panel. These mattresses can be chemically treated according to the needs and uses envisaged, with waterproofing, flame-retardant, disinfectant products, etc.

  
We see that we thus obtain a panel completely enveloping the fibrous mat and hollowed out of cubicles

  
profile and depth meeting the requirements of acoustics and insulation.

  
The number and location of these tiles may also vary depending on the types of panels; they may, for example, be larger or more numerous per unit area in certain cases; some may be veiled by a diaphragm either on one side or the other, or even partially on the same panel.

  
The panel thus manufactured constitutes a clearly characterized new industrial product; it can be used to form a single or double partition by panels placed parallel to each other, and connected by seals or spacers, depending on whether the space between the parallel panels must remain empty or be filled by any filling (soft wool, glass wool, etc.). In the case of the use of panels thus paired, it is noted that the absorption of sound is almost complete, the sound waves being returned from a panel

  
to the other and absorbed by the cubicles described above.

  
The manufacture of the panels can be done in aluminum molds, sheet metal, reinforced cement or any other suitable material.

  
The examples which have just been described may receive minor modifications which do not go beyond the scope of the invention; these modifications may relate in particular to:

  
1) The dimensions, and mainly the thickness

  
partitions of panels;

  
 <EMI ID = 9.1>

  
measurements of perforations;

  
3) The thickness of the diaphragms, or the elimination of some of them;

  
4) The thickness of the fibrous mat and its reinforcement;

  
5) The use of panels, singly or in pairs;

  
6) Incorporation in the cast product of all suitable materials, such as. pozzolan, dolomite and similar stone powders.

  
Thanks to the molds thus formed, the problem of vibrating concrete panels or tiles is solved, mainly when a mattress is used.

  
of glass wool or other insulating material, absorbent, flexible, and forming a spring under the pressure of the concrete during rolling. It will suffice, in fact, to cover the perforated faces (which tend to swell on demolding) with plates of a weight calculated to compensate for the thrust of the glass or equivalent felt mat.

  
If these compensating plates are perforated, they can cover the entire surface of the panel. If they are not, it is sufficient to leave the series of lower or upper holes uncovered. This process makes it possible to shape the perforated face without deformation on drying.

  
A similar process can finally be adapted with advantage if it is desired to incorporate reinforcing elements, or simply decorative elements, such as in particular dolomite, marble, porphyry, etc. chippings, etc. In this case, plate 4 wearing

  
of the projections 5 and serving as a base support, is first of all embedded under a first layer of concrete. On this is applied the glass wool veil, carrying on its upper face its support, preferably waterproof (paper, cardboard, etc.). Then intervenes

  
the pouring of the second layer of concrete, which is smoothed and vibrated, and in which the chosen chippings are incorporated, during or at the end of the vibration. These, either by smoothing or by vibration, will be entirely taken up in the mass of concrete - only those of the limit zone


    

Claims (1)

will appear, but without going beyond the alignment plane smoothed and vibrated surface During demoulding, internal physicochemical phenomena tend to cause the concrete to swell, and the gravel from the boundary zone would be driven outwards and would irregularly overflow the smoothing plane of the concrete. To counter this threat, the demoulded plate will simply be turned upside down, the smooth side against the ground, which will be flat and hard. Its own weight, and possible overload such as that discussed above, will forcefully press the smooth face against the floor, and keep chippings from protruding until the panel has hardened. This smooth surface can subsequently be polished by any known method. <EMI ID = 10.1> Improvement in the manufacture of insulating panels absorbing mainly sound and heat, these improvements involving: 1. On the manufacturing process in vertical molds, <EMI ID = 11.1> manufacturing; this apparatus consists of molds, some panels of which have protrusions in profile, of variable distribution and dimensions, a fibrous mat that can be embedded in the casting mass, and itself armed. New industrial product consisting of pan- <EMI ID = 12.1> containing a fully coated inner fibrous mat.