Sound-absorbing insulation element with strengthening embossments
The sound-absorbing insulation element is used everywhere sound and/or heat sources have to be shielded, preferably in automotive engineering as a heat shield. The insulation element comprises at least one studded sheet-shaped element which is provided with strengthening embossments. The strengthening embossments have an embossment base and embossment flanks. According to the invention, the sheet-shaped element exhibits material compression, that is to say material hardening, in the region of the embossment flanks. Fissures which have a bizarrely shaped contour lie in the embossment base. These fissures are produced by the stretching and tearing of the embossment base.
1. A sound-absorbing insulation element, comprising:
a sheet having a plurality of studs and at least one of the studs having at least one strengthening embossment,
the at least one strengthening embossment defining an embossment base and embossment flanks; and
a perforation located on the embossment base, the perforation being a fissure with irregular contours.
2. The insulation element of claim 1 , wherein the insulation element has a zone without strengthening embossments.
3. The insulation element of claim 1 , wherein the strengthening embossment is round.
4. The insulation element of claim 1 , wherein the strengthening embossment is rectangular.
5. The insulation element of claim 1 , wherein the strengthening embossment is hexagonal.
6. The insulation element of claim 1 , wherein the strengthening embossment is triangular.
7. The insulation element of claim 1 , wherein the strengthening embossment is trapezoidal.
8. The insulation element of claim 1 , wherein the strengthening embossment is star-shaped.
9. The insulation element of claim 1 , wherein the embossment base has a thickness b and the sheet has a thickness d, the ratio b/d being less than or equal to about 1/10.
10. The insulation element of claim 1 , wherein the strengthening embossment further defines a width a and the sheet has a thickness d, the ratio a/d being greater than or equal to about 3/1.
11. The insulation element of claim 1 , wherein the insulation element is formed of a metallic material.
12. The insulation element of claim 1 , wherein the insulation element is formed of a plastic material.
13. The insulation element of claim 1 , wherein the insulation element is formed of a composite material comprising a metallic material and a plastic material.
14. The insulation element of claim 1 , wherein the studded sheet comprises an aluminum sheet having a thickness of about 0.3 mm to about 0.5 mm.
15. The insulation element of claim 1 , wherein the sheet has a plurality of strengthening embossments and a plurality of fissures situated within the strengthening embossments, the plurality of fissures being randomly aligned.
16. A sound absorbing insulation element, the sound absorbing insulation element comprising two opposing sheets, wherein at least one of the two opposing sheets has a plurality of studs and at least one of the studs having at least one strengthening embossment, the at least one strengthening embossment defining an embossment base and embossment flanks, and a perforation located on the embossment base, the perforation being a fissure with irregular contours.
17. The sound absorbing insulation element of claim 16 , wherein the insulation element further comprises insulating materials between the two opposing sheets.
18. The sound absorbing insulation element of claim 17 , wherein the insulating material have an airflow resistance of 500 to 5000 Ns/m 3 .
19. The sound absorbing insulation element of claim 16 , wherein an airspace is located between the two opposing sheets.