| 摘要 |
<p>Provided is an air-conditioning duct such that narrow weld ribs can be reliably formed during blow-molding and such that the interval between adjoining two weld ribs can be set narrower, thereby improving the design of a car interior component. This air-conditioning duct (10) has a duct body unit that is formed by expanding a parison and compression-molded sections (30) that are formed by partially collapsing the parison. The compression-molded section (30) has: a base part (31) that faces the back surface (22a) of an instrument panel (22); recessed parts (33) that are recessed toward the front surface (31b) side from the back surface (31a) side of the base part (31) and extend in a vibrating direction; and weld ribs (37) that are provided on the front surface (31b) side of the base part (31) in multiple units per one recessed part (33), protrude toward the back surface (22a) side of the instrument panel (22) while extending in the vibrating direction, and are vibration-welded to the back surface (22a) of the instrument panel (22).</p> |
