주입 성형에서 냉각 효율을 높이기 위한 형상 적응형 냉각 채널의 설계 및 최적화

Abstract

The study establishes a mathematical model to analyze the heat transfer in injection molds and investigates the factors that influence cooling time and temperature distribution. Analysis of variance and response surface methodology are employed to examine the impact of geometrical parameters of the cooling channels. The NSGA-II multi-objective optimization algorithm is then applied to optimize the conformal cooling channels for products with varying wall thicknesses, resulting in Pareto optimal solutions for the channel design parameters. For plastic products with a wall thickness less than 2 mm, the diameter of the conformal cooling channels () is set to 4 mm, the distance between adjacent channel centerlines () is set to 8 mm, and the distance from the channel center to the cavity surface () is set to 6 mm. For wall thickness between 2-4mm, =8mm, =16mm, =12mm. For wall thickness between 4-6mm, =12.5mm, =24mm, =18mm. The simulation results demonstrate that the implementation of conformal cooling channels can reduce cooling time by 30% compared to traditional channels. Furthermore, the uniformity of temperature distribution across the entire plastic product is improved, leading to high-quality of products.