| 摘要 |
PURPOSE:To manufacture a heat insulating duct continuously including the adhesion of a skin material. CONSTITUTION:A belt-type sheet 3 is wound spirally around the surface of a mandrel 2 to form a slide tube 7 while a belt type glass wool mat 8 is wound spirally around the surface of the slide tube 7 to form a tubular body 9. The tubular body 9 is heated to cure it and, thereafter, a belt type skin material 15 is wound spirally to manufacture the heat insulating duct. |
