Abstract: This article reported a case study on the application of CAE technology for mold design of car engine hood. The hot runner system was first designed by combination of CAE technology and rheological theory. The projects derived from the original design and optimized design was analyzed and compared through simulating the whole injection molding process of a car engine hood. The feasibility of the optimized design project was confirmed by the practical production, and the qualified products were also manufactured successfully.

Key words: car engine hood, mould, hot runner system, optimized mold design