1. Calculate the time to fill the mold, as depicted below, with molten metal if the metal level at plane A is maintained constant and the time to fill the runner system (entering piping) is ignored. Data (all may be taken as constant): h= 1.65x10 N s m; r = 6,410 kg m; f= - 100 200 f 0.0025 (runner); e, (contraction) = 0.1; e (enlargement for liquid levels below B)= 0; e, (enlargement for liquid f levels above B) = 1.0; L/D (90 turn) = 25; b= 1.0. HINT: First find the time to fill the lower part (lower than plane B) of the mold. Then find the time to fill the upper part of the mold (above the runner level). ADD them up Dia. 30 latm 100 Plane A Dimensions in mm. latm st - 300 (diameter) ANSWER: 14.9 s 150 300 Plane B