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1. (WO2017153685) METHOD FOR CREATING A THERMO-ACOUSTIC PROTECTIVE SCREEN FOR A MOTOR VEHICLE

Pub. No.:    WO/2017/153685    International Application No.:    PCT/FR2017/050522
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Fri Mar 10 00:59:59 CET 2017
IPC: B60R 13/08
B29C 51/12
B29C 51/14
Applicants: CERA APS
Inventors: TANDART, Joël
Title: METHOD FOR CREATING A THERMO-ACOUSTIC PROTECTIVE SCREEN FOR A MOTOR VEHICLE
Abstract:
The invention relates to a method comprising the following steps: providing a first (2) and a second (3) porous layer capable of being moulded by thermocompression; providing an insulating layer (4) containing air bubbles (6) comprising two sheets coated on their external surface with a respective metallic sublayer; placing a stack comprising said first layer, said insulating layer and said second layer superposed on one another in a mould (10), said mould being designed to perform accentuated crushing along a peripheral strip (8) of said insulating layer; moulding said stack to moulding temperature so as to mould said porous layers, so as to create, by means of said crushing, a weld welding the said insulating layer between said sheets at its periphery, and so as to cause said bubbles to burst, under the effect of heat, to create a layer of air between said porous layers; releasing the assembly obtained from the mould, which assembly exhibits said layer of air trapped between the metallic sublayers.