Insulating panel for thermal expansion compensation

Abstract

The invention consists of a panel comprising an insulating core ( 10 ) and two outer faces ( 2, 3 ) made of metallic sheet and disposed on opposite sides with respect thereto, wherein a cushion ( 12 ) of mineral wool is arranged between one of the outer faces and the insulating core. In this way a panel is obtained which is capable of compensating for the thermal expansion of the sheet metal, especially in the case of fire.

1 . A panel comprising an insulating core ( 10 ;  30 ), two outer faces ( 2 ,  3 ;  22 ,  23 ) made of metallic sheet disposed on opposite sides with respect to said core, characterised in that it comprises a cushion ( 12 ,  32 ) of mineral wool interposed between at least one of said outer faces and the insulating core.  
   
   
       2 . A panel according to  claim 1 , wherein the cushion ( 10 ) of mineral wool is fixed to the adjacent face ( 2 ,  3 ;  22 ,  23 ) of the panel.  
   
   
       3 . A panel according to  claim 2 , wherein the cushion is fixed to the face ( 2 ,  3 ;  22 ,  23 ) of the panel by means of adhesive.  
   
   
       4 . A panel according to the preceding claims, wherein the thickness of the cushion ( 12 ,  32 ) of mineral wool is between 10 and 50% of the thickness of the panel.  
   
   
       5 . A panel according to  claim 4 , wherein the density of the mineral wool is between 40 and 200 kg/M 3 .  
   
   
       6 . A panel according to the preceding claims, wherein the fibres of the cushion ( 12 ,  32 ) are orientated predominantly in a direction parallel to the ribs of the outer faces ( 2 ,  3 ;  22 ,  23 ) or in a direction substantially perpendicular to the latter.  
   
   
       7 . A panel according to the preceding claims, wherein the insulating core ( 10 ,  30 ) is obtained with a polyurethane or phenolic foam.  
   
   
       8 . A panel according to the preceding claims, wherein the insulating core ( 10 ,  30 ) comprises a slab of one of the following materials: perlite, extruded polystyrene or expanded polystyrene.  
   
   
       9 . A panel according to the preceding claims, wherein the outer face ( 3 ) adjacent to the cushion ( 12 ) of mineral wool is provided with a plurality of holes ( 9 ).  
   
   
       10 . A panel according to  claim 9 , wherein the holes ( 9 ) have diameter from 2 to 4 mm and pitch from 4 to 6 mm.  
   
   
       11 . A panel according to  claim 10 , wherein the ratio empty/full of the face ( 3 ) with the holes ( 9 ) is about 33%.