초록 ▼

The invention relates to a soundproof thermal shield (3), particularly for motor vehicles, comprising an aluminum support (4), a noise-absorbing layer (6) and an aluminum thermal covering (7). In order to make the inventive soundproof thermal shield easy to recycle while obtaining a great thermal s

The invention relates to a soundproof thermal shield (3), particularly for motor vehicles, comprising an aluminum support (4), a noise-absorbing layer (6) and an aluminum thermal covering (7). In order to make the inventive soundproof thermal shield easy to recycle while obtaining a great thermal shielding effect and noise-absorbing power, a permeable mat made of knitted aluminum is used as a noise-absorbing layer (6), said knitted aluminum being superimposed in several layers and pressed so as to form the permeable mat. The inventive thermal shield is thus made of a single material. Preferably, the support (4) is made of a microperforated aluminum sheet while the thermal covering (7) is preferably made from an aluminum film.

대표청구항 ▼

The invention claimed is: 1. A soundproof thermal shield (3) for motor vehicles, comprising a support (4) made from aluminum, at least one noise-absorbing layer (6), and a thermal covering (7) made from aluminum, wherein the at least one noise-absorbing layer (6) is created from multiple plies (12)

The invention claimed is: 1. A soundproof thermal shield (3) for motor vehicles, comprising a support (4) made from aluminum, at least one noise-absorbing layer (6), and a thermal covering (7) made from aluminum, wherein the at least one noise-absorbing layer (6) is created from multiple plies (12) of knitted aluminum fabric wherein at least 5 superimposed plies (12) of knitted aluminum fabric are compressed to create a permeable mat (10) in such manner that the mat (10) has a thickness in the range from 0.5 to 3 mm and a microporous structure with a plurality of narrow, branched channels (11), wherein the support (4) has a free side with a plurality of noise pass-through apertures (5) the diameter of which is in the range from 0.1 to 1.9 mm, up to 24 noise pass-through apertures (5) per cm2 being arranged thereon. 2. The thermal shield according to claim 1, wherein the mat (10) has a weight per unit area in the range of 8 to 15 g/dm2. 3. The thermal shield according to claim 1, wherein the mat (10) has a flow resistance per unit length of equal to or greater than 5 kNs/m4. 4. The thermal shield according to claim 1, wherein the knitted aluminum fabric is in the form of a single-thread knitted fabric. 5. The thermal shield according to claim 1, wherein the knitted aluminum fabric is constructed such that the average distance (a) between two consecutive stitch wales is greater than the average distance (b) between the two legs (15, 16) of a stitch. 6. The thermal shield according to claim 1, wherein the knitted aluminum fabric has stitch wales and/or stitch rows of varying width. 7. The thermal shield according to claim 1, wherein the support (4) has a thickness of 0.5 to 0.8 mm. 8. The thermal shield according to claim 1, wherein the thermal covering (7) is made from aluminum foil. 9. The thermal shield according to claim 1, wherein the thermal covering (7) is microperforated. 10. The thermal shield according to claim 1, wherein the support (4) and/or thermal covering (7) are profiled. 11. The thermal shield according to claim 1, wherein the support has an essentially flat surface. 12. The thermal shield according to claim 1, wherein a spacer (20, 20") is arranged between the support (4) and the noise absorption-layer (6) and/or between the noise absorption layer (6') and the thermal covering (7). 13. The thermal shield according to claim 1, wherein at least two noise absorption layers (6, 6') are present, a spacer (20') being arranged therebetween. 14. The thermal shield according to claim 12, wherein the spacer is made from a profiled aluminum foil.