Method of manufacturing soundproof trim panel for automobile interior

摘要

The present invention comprises the steps of: forming an elastically compressible lower layer (2); heating the lower layer; placing it in a mold and forming it to form a spring layer of a "spring mass" type vibration isolation system The invention relates to a method comprising the steps of bonding the same layer and the upper layer (3) constituting the majority of the "spring mass" system. According to the invention, said lower layer comprises a mixture of elastically compressible foam pieces (4), said foam pieces occupying at least 80% by weight of said lower layer, and also with coupling fibers (5) The fibers have a core that is soluble or insoluble at high temperatures and a coating that is soluble at moderate temperatures, and the foam pieces are bonded together by the dissolution of the coatings forming a binder. Thus, the lower layer is in a form in which the foam is bonded.