Moulded soundproofing component, and manufacturing method thereof

摘要

This method includes the placing of the first porous layer (1) onto one part of a wall of a mold cavity having the shape desired by the soundproofing component, the first layer (1) not occupying the entire cavity, and the injection of a foaming polymer composition into the cavity of the mold to form the second open-cell porous layer (3). The two steps of placing the practically airtight intermediate layer (2) onto the first porous layer (1) and of injecting a polymer composition in order to form the second porous layer (3) are carried out simultaneously in a single step of injecting the foaming polymer composition.