| 摘要 |
A method for manufacturing a door panel comprises placing a surface layer material (1), a filler padding (2) made of polyurethane which has not been subjected to any previous treatment and a backing board (3), between ultrasonic machining horns (4) and ultrasonic machining horn rests (5), and applying ultrasonic vibration to desired portions (2a) of said laminate. <IMAGE> |
