Heat shield

Abstract

A heat shield for shielding an object against heat and for absorbing noise comprising two metal layers situated directly adjacent to one another. A first of the metal layers has at least one perforated area, and the second of the metal layers is provided in at least a partial area with protrusions pointing in the direction toward the first metal layer, whose apices press against the first metal layer. The heat shield according to the invention does not have any further layers in addition to the two metal layers, in particular no nonmetallic insulation layer.

1 . A heat shield for shielding an object against heat and for absorbing noise, comprising two metal layers situated directly adjacent to one another, wherein a first of the metal layers has at least one perforated area and the second of the metal layers is provided in at least one partial area with protrusions pointing in the direction toward the first metal layer, whose apices press against the first metal layer. 
   
   
       2 . The heat shield according to  claim 1 , wherein the perforated area extends over the entire area of the first metal layer. 
   
   
       3 . The heat shield according to  claim 1 , wherein the perforated area contains 1 to 200 holes per square centimeter. 
   
   
       4 . The heat shield according to  claim 1 , wherein the area occupied by the holes is between 0.1% and 20% of the total area of the first metal layer. 
   
   
       5 . The heat shield according to  claim 1 , wherein the holes have a diameter of 0.05 mm to 3 mm. 
   
   
       6 . The heat shield according to  claim 1 , wherein the protrusions are implemented as embossments. 
   
   
       7 . The heat shield according to  claim 6 , wherein the embossments have at least one of the following properties:
 a diameter of 2 mm to 20 mm,   a height of 1 mm to 10 mm.   
   
   
       8 . The heat shield according to  claim 6 , wherein 1 to 10 embossments are provided per square centimeter of the second metal layer. 
   
   
       9 . The heat shield according to  claim 1 , wherein at least one of the dimensions and distribution of holes and dimensions and distribution of embossments change over the area occupied thereby. 
   
   
       10 . The heat shield according to  claim 1 , wherein at least one of the dimensions and distribution of holes and dimensions and distribution of embossments change over the area occupied thereby in such a way that the distribution and/or dimension on at least one layer of the heat shield does not have a pattern relationship. 
   
   
       11 . The heat shield according to  claim 9 , wherein at least one of the dimensions and distribution of holes and dimensions and distribution of embossments change independently of one another. 
   
   
       12 . The heat shield according to  claim 1 , wherein the two metal layers are connected to one another in such a way that the edge of one of the two metal layers is at least sectionally folded around the edge of the other metal layer. 
   
   
       13 . The heat shield according to  claim 12 , wherein the edge of the second metal layer is at least sectionally folded around the edge of the first metal layer.