The downsprue leading into the runner of a certain mold has alenght =175mm. The

Question

The downsprue leading into the runner of a certain mold has alenght =175mm. The cross-sectional area at the base of the sprue is400mm2. The mold cavity has a volume=0.001m3.Determine a) The velocity of the molten metal flowing through the baseof the downsprue b) The volume rate of flow. c) The time required to fill the mold cavity. The downsprue leading into the runner of a certain mold has alenght =175mm. The cross-sectional area at the base of the sprue is400mm2. The mold cavity has a volume=0.001m3.Determine a) The velocity of the molten metal flowing through the baseof the downsprue b) The volume rate of flow. c) The time required to fill the mold cavity.

Explanation / Answer

(a) Velocity v = (2 x 9815 x 175)0.5 = (3,435,096)0.5 = 1853 mm/s

(b) Volume flow rate Q = vA = 1853 x 400 = 741,200 mm3/s

(c) Time to fill cavity TMF = V/Q = 1,000,000/741,200 = 1.35

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