METHOD OF MANUFACTURE OF AN ABSORBENT SOUNDPROOFING ELEMENT AND ABSORBENT SOUNDPROOFING ELEMENT OF AUTOMOBILE PANELLING Russian patent published in 2021 - IPC B60R13/08 B29C39/12 B32B5/24 B32B5/32 

FIELD: layered products.

SUBSTANCE: invention relates to a method of manufacture of an absorbent soundproofing element of automobile paneling. The paneling includes a four-layer structure of the first layer of foam, the second layer of foam, a layer of foam with non-woven material and a layer of non-woven material. Method includes the following stages: I) manufacture of non-woven material with a thickness of d; II) pressing the non-woven material to a compressed thickness of d; III) foaming of the second foam on the top side of the compressed layer of non-woven material using the first half of the molding foam for foaming, wherein the second foam at least partially diffuses into the layer of non-woven material and forms an intermediate layer, specifically a high density layer, wherein the intermediate layer consists of a part with thickness of the layer of non-woven material and a second foam; IV) foaming of the second foam on the top side of the second foam farthest from the non-woven material, wherein on the side of the first foam farthest from the second foam an outer surface structure is formed on the second foam, wherein during foaming on stages III) and/or IV) a surface structure is formed of ribs, bubbles, crowns and/or roots on the corresponding side of the second foam farthest from the non-woven material.

EFFECT: invention enables manufacturability of a soundproofing element with high absorbent capacity.

9 cl, 8 dwg