Lower duct for a vehicle and manufacturing methods thereof

Abstract

A method improves a lower duct structure which is capable of guiding air in a direction of an air cleaner in a large size truck. The mounting bracket inserted during a blow molding procedure of a lower duct is changed to a nut type. The nut type mounting bracket is directly inserted into a cavity of a mold, thus enhancing accuracy of a product. Assemblage work is also easily performed and an excellent assembling state is obtained after the assembling operation. Core mold work and the work process related with inserting the core mold are removed from the fabrication processes of the lower duct. Therefore, it is possible to significantly decrease the number of processes from the mold design to the fabrication of the product. Furthermore, the fabrication cost is reduced and the number of steps of work is decreased.

Dependencies are inferred from the claim text.