Production method of a lenticular body for automotive use and lighted badge for motor vehicles provided with such lenticular body

Production method of a lenticular body (3) for automotive use, which has a structure at least partially transparent to light, is provided with a first face (3a) and a second face (3b) opposite to each other, has one or more blind recesses and/or engravings (8) on said second face (3b), and has a monolithic multilayer structure comprising:

• a substantially transparent, polymeric-material front layer (5), which forms said first face (3a) ;
• a substantially opaque, polymeric-material rear layer (7), which forms said second face (3b) and is crossed by said one or more blind recesses and/or engravings (8) ;
• and a substantially transparent, polymeric-material intermediate layer (6), which is interposed between said front layer (5) and said rear layer (7) ;
• said production method being characterised in that it comprises the step of making said intermediate layer (6) first and by injection moulding, in a substantially transparent, high-melting polymeric material;
• and afterward the step of overmoulding said front (5) and rear (7) layers of the lenticular body directly over said intermediate layer (6), on opposite sides thereof.