Method of producing undercover for vehicle

A method of producing an undercover for a vehicle, the method comprising:

• placing a first forming component including a planar surface, second forming components including planar surfaces, and a third forming component including a cavity with an opening in a surface thereof such that the third forming component is sandwiched between the second forming components with the planar surfaces of the second forming components and the surface of the third forming components opposed to the planar surface of the first forming component;
• placing a sheet made of material including thermoplastic and softened between the planar surface of the first forming component and the planar surfaces of the second forming component;
• vacuuming the sheet with the first forming component until a first surface of the sheet is pressed against the planar surface of the first forming component;
• bringing the planar surfaces of the second forming components into contact with a second surface of the sheet;
• and
• moving the third forming component toward the planar surface of the first forming component until the cavity of the third forming component is filled with a portion of the sheet while maintaining the first forming component and the second forming components thereat.