Process of manufacturing a plastic piece, corresponding fixing insert, and resultant piece

Method of manufacturing a plastic part, particularly a piece of motor vehicle interior equipment, the part (2) comprising a main body (10) made of rigid plastic and a coating (12) made of plastic, the main body (10) being overmolded onto the coating (12), characterized in that it comprises the following steps:

• the coating (12) is manufactured;
• at least one orifice (32) is formed through the coating (12), the location of this orifice (32) corresponding to a location where a component (6) will be fixed to the main body (10) when the part (2) is in the assembled state;
• a fixing insert (22) is pushed through the orifice (32), part of the insert projecting from the non-visible side of the coating (12);
• the fixing insert (22) is sealed (30, 36;
• 30, 70) to the coating (12) with respect to the plastic material of the main body (10) in the liquid state;
• the fixing insert (22) is fixed to the coating by temporary holding means (30, 36;
• 30, 70);
• the coating (12) provided with the fixing insert (22) is placed in a mold;
• the mold is closed;
• and
• the plastic of the main body (10) is overmolded onto the non-visible side of the coating (12), the solidified plastic immobilizing the insert.