| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing an air-conditioning duct capable of improving the characteristic of transferring a shape of a protrusion onto a surface of the duct and capable of preventing reduction in ventilation efficiency. <P>SOLUTION: In the method for manufacturing the air-conditioning duct having the protrusion formed on an outer peripheral surface, an extruded foamed resin 11 is subjected to blow molding by use of a duct-shaped mold 12 in which a groove 12a for transfer of a shape of the protrusion is formed on at least part of a surface. Herein, the following relations are satisfied: 0.5 mm<D<5 mm, D<W<4×D, and W<2×T, in which W represents a width of the groove 12a, D represents a depth of the groove 12a, and T represents a thickness of the foamed resin 11. <P>COPYRIGHT: (C)2011,JPO&INPIT |
