Method for molding a part, for example for vehicle interiors, typically a dashboard and/or internal panels, and corresponding part

An injection molding method of a part for vehicle interiors, comprising the steps of:

• arranging a mold having a first injection chamber shaped to define in negative a base of said part;
• injecting thermoplastic material into said first injection chamber;
• extracting the base from the first injection chamber and placing the base in a second injection chamber on the side of a functional wall of said second injection chamber;
• inserting a lining film in said second injection chamber and deforming the lining film so as to arrange the lining film, on a side of an outer surface thereof, adhering to an esthetic wall of the second injection chamber opposite the functional wall;
• injecting an intermediate layer of plastic material, in a gap between an inner wall of the base facing the lining film, and an inner surface of the lining film opposite said outer surface so as to create a single sandwich structure, wherein said intermediate layer is present between the lining film and the base;
• the intermediate layer having lower hardness than the base and forming a yielding padding for the lining film.