先进材料疑固实验室 Gating system Laboratory of Advanced Materials Solidification How to deliver liquid metal fast? By using a sufficient large cross sectional area; By using multiple runners. How to minimize turbulent flow? By using tapered sprue and runners. By bottom filling of the liquid into the mould cavity. e By regulating the change of cross sectional area of the channels according to fluid dynamics principles. 上浒充通大学 SHANGHAI JIAO TONG UNIVERSITYGating system How to deliver liquid metal fast? • By using a sufficient large cross sectional area; • By using multiple runners. How to minimize turbulent flow? • By using tapered sprue and runners. • By bottom filling of the liquid into the mould cavity. • By regulating the change of cross sectional area of the channels according to fluid dynamics principles