IE370 lecture 9

# IE370 lecture 9 - solidification times for each geometry....

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IE370 Lecture 9 th Headup problems Name: In casting experiments performed using a certain alloy and type of sand mold, it took 155 sec for a cube-shaped casting to solidify. The cube was 50 mm on a side. (a) Determine the value of the mold constant C m in Chvorinov's Rule. (b) If the same alloy and mold type were used, find the total solidification time for a cylindrical casting in which the diameter = 30 mm and length = 50 mm. The total solidification times of three casting shapes are to be compared: (1) a sphere with diameter = 10 cm, (2) a cylinder with diameter and length both = 10 cm, and (3) a cube with each side = 10 cm. The same casting alloy is used in the three cases. (a) Determine the relative
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Unformatted text preview: solidification times for each geometry. (b) Based on the results of part (a), which geometric element would make the best riser? (c) If C m = 3.5 min/cm 2 in Chvorinov's Rule, compute the total solidification time for each casting. A riser in the shape of a sphere is to be designed for a sand casting mold. The casting is a rectangular plate, with length = 200 mm, width = 100 mm, and thickness = 18 mm. If the total solidification time of the casting itself is known to be 3.5 min, determine the diameter of the riser so that it will take 25% longer for the riser to solidify....
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## This note was uploaded on 01/17/2012 for the course IE 370 taught by Professor Cheng during the Spring '11 term at Southwestern.

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