Abstract: This paper mainly described the design process of car plastic trunk lid. In order to meet the needs of automotive lightweight, high-molecular materials are used to replace original metal stamping parts, ensuring the trunk lid features an ergonomic base. Meanwhile, plastic trunk lid molding process was optimized to meet the demand for rotary molding, including stress calculation and optimized design of metal inserts .

Key words: trunk lid, rotary molding process, lightweight, metal insert